diff --git a/Android.mk b/Android.mk
index 5582422..3aefb3b 100644
--- a/Android.mk
+++ b/Android.mk
@@ -432,6 +432,8 @@
 	frameworks/base/core/java/android/view/MotionEvent.aidl \
 	frameworks/base/core/java/android/view/Surface.aidl \
 	frameworks/base/core/java/android/view/WindowManager.aidl \
+	frameworks/base/core/java/android/view/WindowAnimationFrameStats.aidl \
+	frameworks/base/core/java/android/view/WindowContentFrameStats.aidl \
 	frameworks/base/core/java/android/widget/RemoteViews.aidl \
 	frameworks/base/core/java/com/android/internal/textservice/ISpellCheckerService.aidl \
 	frameworks/base/core/java/com/android/internal/textservice/ISpellCheckerSession.aidl \
diff --git a/api/current.txt b/api/current.txt
index 7f9602e..e0ada450 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -4752,9 +4752,13 @@
   }
 
   public final class UiAutomation {
+    method public void clearWindowAnimationFrameStats();
+    method public boolean clearWindowContentFrameStats(int);
     method public android.view.accessibility.AccessibilityEvent executeAndWaitForEvent(java.lang.Runnable, android.app.UiAutomation.AccessibilityEventFilter, long) throws java.util.concurrent.TimeoutException;
     method public android.view.accessibility.AccessibilityNodeInfo getRootInActiveWindow();
     method public final android.accessibilityservice.AccessibilityServiceInfo getServiceInfo();
+    method public android.view.WindowAnimationFrameStats getWindowAnimationFrameStats();
+    method public android.view.WindowContentFrameStats getWindowContentFrameStats(int);
     method public java.util.List<android.view.accessibility.AccessibilityWindowInfo> getWindows();
     method public boolean injectInputEvent(android.view.InputEvent, boolean);
     method public final boolean performGlobalAction(int);
@@ -28732,6 +28736,18 @@
     method public static android.view.FocusFinder getInstance();
   }
 
+  public abstract class FrameStats {
+    ctor public FrameStats();
+    method public final long getEndTimeNano();
+    method public final int getFrameCount();
+    method public final long getFramePresentedTimeNano(int);
+    method public final long getRefreshPeriodNano();
+    method public final long getStartTimeNano();
+    field public static final long UNDEFINED_TIME_NANO = -1L; // 0xffffffffffffffffL
+    field protected long[] mFramesPresentedTimeNano;
+    field protected long mRefreshPeriodNano;
+  }
+
   public class GestureDetector {
     ctor public deprecated GestureDetector(android.view.GestureDetector.OnGestureListener, android.os.Handler);
     ctor public deprecated GestureDetector(android.view.GestureDetector.OnGestureListener);
@@ -31056,6 +31072,20 @@
     method public abstract android.view.ActionMode onWindowStartingActionMode(android.view.ActionMode.Callback);
   }
 
+  public final class WindowAnimationFrameStats extends android.view.FrameStats implements android.os.Parcelable {
+    method public int describeContents();
+    method public void writeToParcel(android.os.Parcel, int);
+    field public static final android.os.Parcelable.Creator CREATOR;
+  }
+
+  public final class WindowContentFrameStats extends android.view.FrameStats implements android.os.Parcelable {
+    method public int describeContents();
+    method public long getFramePostedTimeNano(int);
+    method public long getFrameReadyTimeNano(int);
+    method public void writeToParcel(android.os.Parcel, int);
+    field public static final android.os.Parcelable.Creator CREATOR;
+  }
+
   public class WindowId implements android.os.Parcelable {
     method public int describeContents();
     method public boolean isFocused();
diff --git a/core/java/android/app/IUiAutomationConnection.aidl b/core/java/android/app/IUiAutomationConnection.aidl
index 09bf829..347de97 100644
--- a/core/java/android/app/IUiAutomationConnection.aidl
+++ b/core/java/android/app/IUiAutomationConnection.aidl
@@ -19,6 +19,8 @@
 import android.accessibilityservice.IAccessibilityServiceClient;
 import android.graphics.Bitmap;
 import android.view.InputEvent;
+import android.view.WindowContentFrameStats;
+import android.view.WindowAnimationFrameStats;
 import android.os.ParcelFileDescriptor;
 
 /**
@@ -26,7 +28,7 @@
  * on behalf of an instrumentation that it runs. These operations require
  * special permissions which the shell user has but the instrumentation does
  * not. Running privileged operations by the shell user on behalf of an
- * instrumentation is needed for running UiTestCases. 
+ * instrumentation is needed for running UiTestCases.
  *
  * {@hide}
  */
@@ -37,4 +39,8 @@
     boolean setRotation(int rotation);
     Bitmap takeScreenshot(int width, int height);
     void shutdown();
+    boolean clearWindowContentFrameStats(int windowId);
+    WindowContentFrameStats getWindowContentFrameStats(int windowId);
+    void clearWindowAnimationFrameStats();
+    WindowAnimationFrameStats getWindowAnimationFrameStats();
 }
diff --git a/core/java/android/app/UiAutomation.java b/core/java/android/app/UiAutomation.java
index 354a19f..8523d0c 100644
--- a/core/java/android/app/UiAutomation.java
+++ b/core/java/android/app/UiAutomation.java
@@ -33,6 +33,8 @@
 import android.view.InputEvent;
 import android.view.KeyEvent;
 import android.view.Surface;
+import android.view.WindowAnimationFrameStats;
+import android.view.WindowContentFrameStats;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityInteractionClient;
 import android.view.accessibility.AccessibilityNodeInfo;
@@ -674,6 +676,148 @@
         }
     }
 
+    /**
+     * Clears the frame statistics for the content of a given window. These
+     * statistics contain information about the most recently rendered content
+     * frames.
+     *
+     * @param windowId The window id.
+     * @return Whether the window is present and its frame statistics
+     *         were cleared.
+     *
+     * @see android.view.WindowContentFrameStats
+     * @see #getWindowContentFrameStats(int)
+     * @see #getWindows()
+     * @see AccessibilityWindowInfo#getId() AccessibilityWindowInfo.getId()
+     */
+    public boolean clearWindowContentFrameStats(int windowId) {
+        synchronized (mLock) {
+            throwIfNotConnectedLocked();
+        }
+        try {
+            if (DEBUG) {
+                Log.i(LOG_TAG, "Clearing content frame stats for window: " + windowId);
+            }
+            // Calling out without a lock held.
+            return mUiAutomationConnection.clearWindowContentFrameStats(windowId);
+        } catch (RemoteException re) {
+            Log.e(LOG_TAG, "Error clearing window content frame stats!", re);
+        }
+        return false;
+    }
+
+    /**
+     * Gets the frame statistics for a given window. These statistics contain
+     * information about the most recently rendered content frames.
+     * <p>
+     * A typical usage requires clearing the window frame statistics via {@link
+     * #clearWindowContentFrameStats(int)} followed by an interaction with the UI and
+     * finally getting the window frame statistics via calling this method.
+     * </p>
+     * <pre>
+     * // Assume we have at least one window.
+     * final int windowId = getWindows().get(0).getId();
+     *
+     * // Start with a clean slate.
+     * uiAutimation.clearWindowContentFrameStats(windowId);
+     *
+     * // Do stuff with the UI.
+     *
+     * // Get the frame statistics.
+     * WindowContentFrameStats stats = uiAutomation.getWindowContentFrameStats(windowId);
+     * </pre>
+     *
+     * @param windowId The window id.
+     * @return The window frame statistics, or null if the window is not present.
+     *
+     * @see android.view.WindowContentFrameStats
+     * @see #clearWindowContentFrameStats(int)
+     * @see #getWindows()
+     * @see AccessibilityWindowInfo#getId() AccessibilityWindowInfo.getId()
+     */
+    public WindowContentFrameStats getWindowContentFrameStats(int windowId) {
+        synchronized (mLock) {
+            throwIfNotConnectedLocked();
+        }
+        try {
+            if (DEBUG) {
+                Log.i(LOG_TAG, "Getting content frame stats for window: " + windowId);
+            }
+            // Calling out without a lock held.
+            return mUiAutomationConnection.getWindowContentFrameStats(windowId);
+        } catch (RemoteException re) {
+            Log.e(LOG_TAG, "Error getting window content frame stats!", re);
+        }
+        return null;
+    }
+
+    /**
+     * Clears the window animation rendering statistics. These statistics contain
+     * information about the most recently rendered window animation frames, i.e.
+     * for window transition animations.
+     *
+     * @see android.view.WindowAnimationFrameStats
+     * @see #getWindowAnimationFrameStats()
+     * @see android.R.styleable#WindowAnimation
+     */
+    public void clearWindowAnimationFrameStats() {
+        synchronized (mLock) {
+            throwIfNotConnectedLocked();
+        }
+        try {
+            if (DEBUG) {
+                Log.i(LOG_TAG, "Clearing window animation frame stats");
+            }
+            // Calling out without a lock held.
+            mUiAutomationConnection.clearWindowAnimationFrameStats();
+        } catch (RemoteException re) {
+            Log.e(LOG_TAG, "Error clearing window animation frame stats!", re);
+        }
+    }
+
+    /**
+     * Gets the window animation frame statistics. These statistics contain
+     * information about the most recently rendered window animation frames, i.e.
+     * for window transition animations.
+     *
+     * <p>
+     * A typical usage requires clearing the window animation frame statistics via
+     * {@link #clearWindowAnimationFrameStats()} followed by an interaction that causes
+     * a window transition which uses a window animation and finally getting the window
+     * animation frame statistics by calling this method.
+     * </p>
+     * <pre>
+     * // Start with a clean slate.
+     * uiAutimation.clearWindowAnimationFrameStats();
+     *
+     * // Do stuff to trigger a window transition.
+     *
+     * // Get the frame statistics.
+     * WindowAnimationFrameStats stats = uiAutomation.getWindowAnimationFrameStats();
+     * </pre>
+     *
+     * @return The window animation frame statistics.
+     *
+     * @see android.view.WindowAnimationFrameStats
+     * @see #clearWindowAnimationFrameStats()
+     * @see android.R.styleable#WindowAnimation
+     */
+    public WindowAnimationFrameStats getWindowAnimationFrameStats() {
+        synchronized (mLock) {
+            throwIfNotConnectedLocked();
+        }
+        try {
+            if (DEBUG) {
+                Log.i(LOG_TAG, "Getting window animation frame stats");
+            }
+            // Calling out without a lock held.
+            return mUiAutomationConnection.getWindowAnimationFrameStats();
+        } catch (RemoteException re) {
+            Log.e(LOG_TAG, "Error getting window animation frame stats!", re);
+        }
+        return null;
+    }
+
     private static float getDegreesForRotation(int value) {
         switch (value) {
             case Surface.ROTATION_90: {
diff --git a/core/java/android/app/UiAutomationConnection.java b/core/java/android/app/UiAutomationConnection.java
index 91b0d7c..fa40286 100644
--- a/core/java/android/app/UiAutomationConnection.java
+++ b/core/java/android/app/UiAutomationConnection.java
@@ -22,12 +22,15 @@
 import android.graphics.Bitmap;
 import android.hardware.input.InputManager;
 import android.os.Binder;
+import android.os.IBinder;
 import android.os.Process;
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.view.IWindowManager;
 import android.view.InputEvent;
 import android.view.SurfaceControl;
+import android.view.WindowAnimationFrameStats;
+import android.view.WindowContentFrameStats;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.IAccessibilityManager;
 
@@ -47,6 +50,9 @@
     private final IWindowManager mWindowManager = IWindowManager.Stub.asInterface(
             ServiceManager.getService(Service.WINDOW_SERVICE));
 
+    private final IAccessibilityManager mAccessibilityManager = IAccessibilityManager.Stub.asInterface(
+            ServiceManager.getService(Service.ACCESSIBILITY_SERVICE));
+
     private final Object mLock = new Object();
 
     private final Binder mToken = new Binder();
@@ -144,6 +150,76 @@
     }
 
     @Override
+    public boolean clearWindowContentFrameStats(int windowId) throws RemoteException {
+        synchronized (mLock) {
+            throwIfCalledByNotTrustedUidLocked();
+            throwIfShutdownLocked();
+            throwIfNotConnectedLocked();
+        }
+        final long identity = Binder.clearCallingIdentity();
+        try {
+            IBinder token = mAccessibilityManager.getWindowToken(windowId);
+            if (token == null) {
+                return false;
+            }
+            return mWindowManager.clearWindowContentFrameStats(token);
+        } finally {
+            Binder.restoreCallingIdentity(identity);
+        }
+    }
+
+    @Override
+    public WindowContentFrameStats getWindowContentFrameStats(int windowId) throws RemoteException {
+        synchronized (mLock) {
+            throwIfCalledByNotTrustedUidLocked();
+            throwIfShutdownLocked();
+            throwIfNotConnectedLocked();
+        }
+        final long identity = Binder.clearCallingIdentity();
+        try {
+            IBinder token = mAccessibilityManager.getWindowToken(windowId);
+            if (token == null) {
+                return null;
+            }
+            return mWindowManager.getWindowContentFrameStats(token);
+        } finally {
+            Binder.restoreCallingIdentity(identity);
+        }
+    }
+
+    @Override
+    public void clearWindowAnimationFrameStats() {
+        synchronized (mLock) {
+            throwIfCalledByNotTrustedUidLocked();
+            throwIfShutdownLocked();
+            throwIfNotConnectedLocked();
+        }
+        final long identity = Binder.clearCallingIdentity();
+        try {
+            SurfaceControl.clearAnimationFrameStats();
+        } finally {
+            Binder.restoreCallingIdentity(identity);
+        }
+    }
+
+    @Override
+    public WindowAnimationFrameStats getWindowAnimationFrameStats() {
+        synchronized (mLock) {
+            throwIfCalledByNotTrustedUidLocked();
+            throwIfShutdownLocked();
+            throwIfNotConnectedLocked();
+        }
+        final long identity = Binder.clearCallingIdentity();
+        try {
+            WindowAnimationFrameStats stats = new WindowAnimationFrameStats();
+            SurfaceControl.getAnimationFrameStats(stats);
+            return stats;
+        } finally {
+            Binder.restoreCallingIdentity(identity);
+        }
+    }
+
+    @Override
     public void shutdown() {
         synchronized (mLock) {
             if (isConnectedLocked()) {
diff --git a/core/java/android/view/AnimationRenderStats.aidl b/core/java/android/view/AnimationRenderStats.aidl
new file mode 100644
index 0000000..4599708
--- /dev/null
+++ b/core/java/android/view/AnimationRenderStats.aidl
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2014, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view;
+
+parcelable AnimationRenderStats;
diff --git a/core/java/android/view/FrameStats.java b/core/java/android/view/FrameStats.java
new file mode 100644
index 0000000..541b336
--- /dev/null
+++ b/core/java/android/view/FrameStats.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * This is the base class for frame statistics.
+ */
+public abstract class FrameStats {
+    /**
+     * Undefined time.
+     */
+    public static final long UNDEFINED_TIME_NANO = -1;
+
+    protected long mRefreshPeriodNano;
+    protected long[] mFramesPresentedTimeNano;
+
+    /**
+     * Gets the refresh period of the display hosting the window(s) for
+     * which these statistics apply.
+     *
+     * @return The refresh period in nanoseconds.
+     */
+    public final long getRefreshPeriodNano() {
+        return mRefreshPeriodNano;
+    }
+
+    /**
+     * Gets the number of frames for which there is data.
+     *
+     * @return The number of frames.
+     */
+    public final int getFrameCount() {
+        return mFramesPresentedTimeNano != null
+                ? mFramesPresentedTimeNano.length : 0;
+    }
+
+    /**
+     * Gets the start time of the interval for which these statistics
+     * apply. The start interval is the time when the first frame was
+     * presented.
+     *
+     * @return The start time in nanoseconds or {@link #UNDEFINED_TIME_NANO}
+     *         if there is no frame data.
+     */
+    public final long getStartTimeNano() {
+        if (getFrameCount() <= 0) {
+            return UNDEFINED_TIME_NANO;
+        }
+        return mFramesPresentedTimeNano[0];
+    }
+
+    /**
+     * Gets the end time of the interval for which these statistics
+     * apply. The end interval is the time when the last frame was
+     * presented.
+     *
+     * @return The end time in nanoseconds or {@link #UNDEFINED_TIME_NANO}
+     *         if there is no frame data.
+     */
+    public final long getEndTimeNano() {
+        if (getFrameCount() <= 0) {
+            return UNDEFINED_TIME_NANO;
+        }
+        return mFramesPresentedTimeNano[mFramesPresentedTimeNano.length - 1];
+    }
+
+    /**
+     * Get the time a frame at a given index was presented.
+     *
+     * @param index The frame index.
+     * @return The presented time in nanoseconds or {@link #UNDEFINED_TIME_NANO}
+     *         if the frame is not presented yet.
+     */
+    public final long getFramePresentedTimeNano(int index) {
+        if (mFramesPresentedTimeNano == null) {
+            throw new IndexOutOfBoundsException();
+        }
+        return mFramesPresentedTimeNano[index];
+    }
+}
diff --git a/core/java/android/view/IWindowManager.aidl b/core/java/android/view/IWindowManager.aidl
index 8f542bb..80d5bf2 100644
--- a/core/java/android/view/IWindowManager.aidl
+++ b/core/java/android/view/IWindowManager.aidl
@@ -37,6 +37,7 @@
 import android.view.InputChannel;
 import android.view.InputDevice;
 import android.view.IInputFilter;
+import android.view.WindowContentFrameStats;
 
 /**
  * System private interface to the window manager.
@@ -233,4 +234,20 @@
      * Device is in safe mode.
      */
     boolean isSafeModeEnabled();
+
+    /**
+     * Clears the frame statistics for a given window.
+     *
+     * @param token The window token.
+     * @return Whether the frame statistics were cleared.
+     */
+    boolean clearWindowContentFrameStats(IBinder token);
+
+    /**
+     * Gets the content frame statistics for a given window.
+     *
+     * @param token The window token.
+     * @return The frame statistics or null if the window does not exist.
+     */
+    WindowContentFrameStats getWindowContentFrameStats(IBinder token);
 }
diff --git a/core/java/android/view/SurfaceControl.java b/core/java/android/view/SurfaceControl.java
index 5a8d2c8..2d55a01 100644
--- a/core/java/android/view/SurfaceControl.java
+++ b/core/java/android/view/SurfaceControl.java
@@ -20,7 +20,6 @@
 import android.graphics.Bitmap;
 import android.graphics.Rect;
 import android.graphics.Region;
-import android.view.Surface;
 import android.os.IBinder;
 import android.util.Log;
 import android.view.Surface.OutOfResourcesException;
@@ -59,6 +58,11 @@
     private static native void nativeSetWindowCrop(long nativeObject, int l, int t, int r, int b);
     private static native void nativeSetLayerStack(long nativeObject, int layerStack);
 
+    private static native boolean nativeClearContentFrameStats(long nativeObject);
+    private static native boolean nativeGetContentFrameStats(long nativeObject, WindowContentFrameStats outStats);
+    private static native boolean nativeClearAnimationFrameStats();
+    private static native boolean nativeGetAnimationFrameStats(WindowAnimationFrameStats outStats);
+
     private static native IBinder nativeGetBuiltInDisplay(int physicalDisplayId);
     private static native IBinder nativeCreateDisplay(String name, boolean secure);
     private static native void nativeDestroyDisplay(IBinder displayToken);
@@ -357,6 +361,24 @@
         nativeSetTransparentRegionHint(mNativeObject, region);
     }
 
+    public boolean clearContentFrameStats() {
+        checkNotReleased();
+        return nativeClearContentFrameStats(mNativeObject);
+    }
+
+    public boolean getContentFrameStats(WindowContentFrameStats outStats) {
+        checkNotReleased();
+        return nativeGetContentFrameStats(mNativeObject, outStats);
+    }
+
+    public static boolean clearAnimationFrameStats() {
+        return nativeClearAnimationFrameStats();
+    }
+
+    public static boolean getAnimationFrameStats(WindowAnimationFrameStats outStats) {
+        return nativeGetAnimationFrameStats(outStats);
+    }
+
     /**
      * Sets an alpha value for the entire Surface.  This value is combined with the
      * per-pixel alpha.  It may be used with opaque Surfaces.
@@ -542,7 +564,6 @@
         return nativeGetBuiltInDisplay(builtInDisplayId);
     }
 
-
     /**
      * Copy the current screen contents into the provided {@link Surface}
      *
@@ -592,7 +613,6 @@
         screenshot(display, consumer, 0, 0, 0, 0, true, false);
     }
 
-
     /**
      * Copy the current screen contents into a bitmap and return it.
      *
@@ -626,8 +646,8 @@
     }
 
     /**
-     * Like {@link SurfaceControl#screenshot(int, int, int, int)} but includes all
-     * Surfaces in the screenshot.
+     * Like {@link SurfaceControl#screenshot(int, int, int, int, boolean)} but
+     * includes all Surfaces in the screenshot.
      *
      * @param width The desired width of the returned bitmap; the raw
      * screen will be scaled down to this size.
diff --git a/core/java/android/view/WindowAnimationFrameStats.aidl b/core/java/android/view/WindowAnimationFrameStats.aidl
new file mode 100644
index 0000000..77f544b
--- /dev/null
+++ b/core/java/android/view/WindowAnimationFrameStats.aidl
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2014, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view;
+
+parcelable WindowAnimationFrameStats;
diff --git a/core/java/android/view/WindowAnimationFrameStats.java b/core/java/android/view/WindowAnimationFrameStats.java
new file mode 100644
index 0000000..c60b96c
--- /dev/null
+++ b/core/java/android/view/WindowAnimationFrameStats.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * This class contains window animation frame statistics. For example, a window
+ * animation is usually performed when the application is transitioning from one
+ * activity to another. The frame statistics are a snapshot for the time interval
+ * from {@link #getStartTimeNano()} to {@link #getEndTimeNano()}.
+ * <p>
+ * The key idea is that in order to provide a smooth user experience the system should
+ * run window animations at a specific time interval obtained by calling {@link
+ * #getRefreshPeriodNano()}. If the system does not render a frame every refresh
+ * period the user will see irregular window transitions. The time when the frame was
+ * actually presented on the display by calling {@link #getFramePresentedTimeNano(int)}.
+ */
+public final class WindowAnimationFrameStats extends FrameStats implements Parcelable {
+    /**
+     * @hide
+     */
+    public WindowAnimationFrameStats() {
+        /* do nothing */
+    }
+
+    /**
+     * Initializes this isntance.
+     *
+     * @param refreshPeriodNano The display refresh period.
+     * @param framesPresentedTimeNano The presented frame times.
+     *
+     * @hide
+     */
+    public void init(long refreshPeriodNano, long[] framesPresentedTimeNano) {
+        mRefreshPeriodNano = refreshPeriodNano;
+        mFramesPresentedTimeNano = framesPresentedTimeNano;
+    }
+
+    private WindowAnimationFrameStats(Parcel parcel) {
+        mRefreshPeriodNano = parcel.readLong();
+        mFramesPresentedTimeNano = parcel.createLongArray();
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel parcel, int flags) {
+        parcel.writeLong(mRefreshPeriodNano);
+        parcel.writeLongArray(mFramesPresentedTimeNano);
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+        builder.append("WindowAnimationFrameStats[");
+        builder.append("frameCount:" + getFrameCount());
+        builder.append(", fromTimeNano:" + getStartTimeNano());
+        builder.append(", toTimeNano:" + getEndTimeNano());
+        builder.append(']');
+        return builder.toString();
+    }
+
+    public static final Creator<WindowAnimationFrameStats> CREATOR =
+            new Creator<WindowAnimationFrameStats>() {
+                @Override
+                public WindowAnimationFrameStats createFromParcel(Parcel parcel) {
+                    return new WindowAnimationFrameStats(parcel);
+                }
+
+                @Override
+                public WindowAnimationFrameStats[] newArray(int size) {
+                    return new WindowAnimationFrameStats[size];
+                }
+            };
+}
diff --git a/core/java/android/view/WindowContentFrameStats.aidl b/core/java/android/view/WindowContentFrameStats.aidl
new file mode 100644
index 0000000..aa9c2d6
--- /dev/null
+++ b/core/java/android/view/WindowContentFrameStats.aidl
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2014, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view;
+
+parcelable WindowContentFrameStats;
diff --git a/core/java/android/view/WindowContentFrameStats.java b/core/java/android/view/WindowContentFrameStats.java
new file mode 100644
index 0000000..c6da2fb
--- /dev/null
+++ b/core/java/android/view/WindowContentFrameStats.java
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * This class contains window content frame statistics. For example, a window content
+ * is rendred in frames when a view is scrolled. The frame statistics are a snapshot
+ * for the time interval from {@link #getStartTimeNano()} to {@link #getEndTimeNano()}.
+ * <p>
+ * The key idea is that in order to provide a smooth user experience an application
+ * has to draw a frame at a specific time interval obtained by calling {@link
+ * #getRefreshPeriodNano()}. If the application does not render a frame every refresh
+ * period the user will see irregular UI transitions.
+ * </p>
+ * <p>
+ * An application posts a frame for presentation by synchronously rendering its contents
+ * in a buffer which is then posted or posting a buffer to which the application is
+ * asychronously rendering the content via GL. After the frame is posted and rendered
+ * (potentially asynchronosly) it is presented to the user. The time a frame was posted
+ * can be obtained via {@link #getFramePostedTimeNano(int)}, the time a frame content
+ * was rendered and ready for dsiplay (GL case) via {@link #getFrameReadyTimeNano(int)},
+ * and the time a frame was presented on the screen via {@link #getFramePresentedTimeNano(int)}.
+ * </p>
+ */
+public final class WindowContentFrameStats extends FrameStats implements Parcelable {
+    private long[] mFramesPostedTimeNano;
+    private long[] mFramesReadyTimeNano;
+
+    /**
+     * @hide
+     */
+    public WindowContentFrameStats() {
+        /* do nothing */
+    }
+
+    /**
+     * Initializes this isntance.
+     *
+     * @param refreshPeriodNano The display refresh period.
+     * @param framesPostedTimeNano The times in milliseconds for when the frame contents were posted.
+     * @param framesPresentedTimeNano The times in milliseconds for when the frame contents were presented.
+     * @param framesReadyTimeNano The times in milliseconds for when the frame contents were ready to be presented.
+     *
+     * @hide
+     */
+    public void init(long refreshPeriodNano, long[] framesPostedTimeNano,
+            long[] framesPresentedTimeNano, long[] framesReadyTimeNano) {
+        mRefreshPeriodNano = refreshPeriodNano;
+        mFramesPostedTimeNano = framesPostedTimeNano;
+        mFramesPresentedTimeNano = framesPresentedTimeNano;
+        mFramesReadyTimeNano = framesReadyTimeNano;
+    }
+
+    private WindowContentFrameStats(Parcel parcel) {
+        mRefreshPeriodNano = parcel.readLong();
+        mFramesPostedTimeNano = parcel.createLongArray();
+        mFramesPresentedTimeNano = parcel.createLongArray();
+        mFramesReadyTimeNano = parcel.createLongArray();
+    }
+
+    /**
+     * Get the time a frame at a given index was posted by the producer (e.g. the application).
+     * It is either explicitly set or defaulted to the time when the render buffer was posted.
+     * <p>
+     * <strong>Note:</strong> A frame can be posted and still it contents being rendered
+     * asynchronously in GL. To get the time the frame content was completely rendered and
+     * ready to display call {@link #getFrameReadyTimeNano(int)}.
+     * </p>
+     *
+     * @param index The frame index.
+     * @return The posted time in nanoseconds.
+     */
+    public long getFramePostedTimeNano(int index) {
+        if (mFramesPostedTimeNano == null) {
+            throw new IndexOutOfBoundsException();
+        }
+        return mFramesPostedTimeNano[index];
+    }
+
+    /**
+     * Get the time a frame at a given index was ready for presentation.
+     * <p>
+     * <strong>Note:</strong> A frame can be posted and still it contents being rendered
+     * asynchronously in GL. In such a case this is the time when the frame contents were
+     * completely rendered.
+     * </p>
+     *
+     * @param index The frame index.
+     * @return The ready time in nanoseconds or {@link #UNDEFINED_TIME_NANO}
+     *         if the frame is not ready yet.
+     */
+    public long getFrameReadyTimeNano(int index) {
+        if (mFramesReadyTimeNano == null) {
+            throw new IndexOutOfBoundsException();
+        }
+        return mFramesReadyTimeNano[index];
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel parcel, int flags) {
+        parcel.writeLong(mRefreshPeriodNano);
+        parcel.writeLongArray(mFramesPostedTimeNano);
+        parcel.writeLongArray(mFramesPresentedTimeNano);
+        parcel.writeLongArray(mFramesReadyTimeNano);
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+        builder.append("WindowContentFrameStats[");
+        builder.append("frameCount:" + getFrameCount());
+        builder.append(", fromTimeNano:" + getStartTimeNano());
+        builder.append(", toTimeNano:" + getEndTimeNano());
+        builder.append(']');
+        return builder.toString();
+    }
+
+    public static final Parcelable.Creator<WindowContentFrameStats> CREATOR =
+            new Creator<WindowContentFrameStats>() {
+                @Override
+                public WindowContentFrameStats createFromParcel(Parcel parcel) {
+                    return new WindowContentFrameStats(parcel);
+                }
+
+                @Override
+                public WindowContentFrameStats[] newArray(int size) {
+                    return new WindowContentFrameStats[size];
+                }
+            };
+}
diff --git a/core/java/android/view/accessibility/IAccessibilityManager.aidl b/core/java/android/view/accessibility/IAccessibilityManager.aidl
index fe3e5c6..b6570cc 100644
--- a/core/java/android/view/accessibility/IAccessibilityManager.aidl
+++ b/core/java/android/view/accessibility/IAccessibilityManager.aidl
@@ -57,4 +57,6 @@
 
     void temporaryEnableAccessibilityStateUntilKeyguardRemoved(in ComponentName service,
             boolean touchExplorationEnabled);
+
+    IBinder getWindowToken(int windowId);
 }
diff --git a/core/jni/android_view_SurfaceControl.cpp b/core/jni/android_view_SurfaceControl.cpp
index 159ffb2..8141a00 100644
--- a/core/jni/android_view_SurfaceControl.cpp
+++ b/core/jni/android_view_SurfaceControl.cpp
@@ -34,6 +34,7 @@
 #include <gui/SurfaceComposerClient.h>
 
 #include <ui/DisplayInfo.h>
+#include <ui/FrameStats.h>
 #include <ui/Rect.h>
 #include <ui/Region.h>
 
@@ -64,6 +65,16 @@
     delete ((ScreenshotClient*) context);
 }
 
+static struct {
+    nsecs_t UNDEFINED_TIME_NANO;
+    jmethodID init;
+} gWindowContentFrameStatsClassInfo;
+
+static struct {
+    nsecs_t UNDEFINED_TIME_NANO;
+    jmethodID init;
+} gWindowAnimationFrameStatsClassInfo;
+
 // ----------------------------------------------------------------------------
 
 static jlong nativeCreate(JNIEnv* env, jclass clazz, jobject sessionObj,
@@ -371,6 +382,151 @@
     SurfaceComposerClient::unblankDisplay(token);
 }
 
+static jboolean nativeClearContentFrameStats(JNIEnv* env, jclass clazz, jlong nativeObject) {
+    SurfaceControl* const ctrl = reinterpret_cast<SurfaceControl *>(nativeObject);
+    status_t err = ctrl->clearLayerFrameStats();
+
+    if (err < 0 && err != NO_INIT) {
+        doThrowIAE(env);
+    }
+
+    // The other end is not ready, just report we failed.
+    if (err == NO_INIT) {
+        return JNI_FALSE;
+    }
+
+    return JNI_TRUE;
+}
+
+static jboolean nativeGetContentFrameStats(JNIEnv* env, jclass clazz, jlong nativeObject,
+    jobject outStats) {
+    FrameStats stats;
+
+    SurfaceControl* const ctrl = reinterpret_cast<SurfaceControl *>(nativeObject);
+    status_t err = ctrl->getLayerFrameStats(&stats);
+    if (err < 0 && err != NO_INIT) {
+        doThrowIAE(env);
+    }
+
+    // The other end is not ready, fine just return empty stats.
+    if (err == NO_INIT) {
+        return JNI_FALSE;
+    }
+
+    jlong refreshPeriodNano = static_cast<jlong>(stats.refreshPeriodNano);
+    size_t frameCount = stats.desiredPresentTimesNano.size();
+
+    jlongArray postedTimesNanoDst = env->NewLongArray(frameCount);
+    if (postedTimesNanoDst == NULL) {
+        return JNI_FALSE;
+    }
+
+    jlongArray presentedTimesNanoDst = env->NewLongArray(frameCount);
+    if (presentedTimesNanoDst == NULL) {
+        return JNI_FALSE;
+    }
+
+    jlongArray readyTimesNanoDst = env->NewLongArray(frameCount);
+    if (readyTimesNanoDst == NULL) {
+        return JNI_FALSE;
+    }
+
+    nsecs_t postedTimesNanoSrc[frameCount];
+    nsecs_t presentedTimesNanoSrc[frameCount];
+    nsecs_t readyTimesNanoSrc[frameCount];
+
+    for (size_t i = 0; i < frameCount; i++) {
+        nsecs_t postedTimeNano = stats.desiredPresentTimesNano[i];
+        if (postedTimeNano == INT64_MAX) {
+            postedTimeNano = gWindowContentFrameStatsClassInfo.UNDEFINED_TIME_NANO;
+        }
+        postedTimesNanoSrc[i] = postedTimeNano;
+
+        nsecs_t presentedTimeNano = stats.actualPresentTimesNano[i];
+        if (presentedTimeNano == INT64_MAX) {
+            presentedTimeNano = gWindowContentFrameStatsClassInfo.UNDEFINED_TIME_NANO;
+        }
+        presentedTimesNanoSrc[i] = presentedTimeNano;
+
+        nsecs_t readyTimeNano = stats.frameReadyTimesNano[i];
+        if (readyTimeNano == INT64_MAX) {
+            readyTimeNano = gWindowContentFrameStatsClassInfo.UNDEFINED_TIME_NANO;
+        }
+        readyTimesNanoSrc[i] = readyTimeNano;
+    }
+
+    env->SetLongArrayRegion(postedTimesNanoDst, 0, frameCount, postedTimesNanoSrc);
+    env->SetLongArrayRegion(presentedTimesNanoDst, 0, frameCount, presentedTimesNanoSrc);
+    env->SetLongArrayRegion(readyTimesNanoDst, 0, frameCount, readyTimesNanoSrc);
+
+    env->CallVoidMethod(outStats, gWindowContentFrameStatsClassInfo.init, refreshPeriodNano,
+            postedTimesNanoDst, presentedTimesNanoDst, readyTimesNanoDst);
+
+    if (env->ExceptionCheck()) {
+        return JNI_FALSE;
+    }
+
+    return JNI_TRUE;
+}
+
+static jboolean nativeClearAnimationFrameStats(JNIEnv* env, jclass clazz) {
+    status_t err = SurfaceComposerClient::clearAnimationFrameStats();
+
+    if (err < 0 && err != NO_INIT) {
+        doThrowIAE(env);
+    }
+
+    // The other end is not ready, just report we failed.
+    if (err == NO_INIT) {
+        return JNI_FALSE;
+    }
+
+    return JNI_TRUE;
+}
+
+static jboolean nativeGetAnimationFrameStats(JNIEnv* env, jclass clazz, jobject outStats) {
+    FrameStats stats;
+
+    status_t err = SurfaceComposerClient::getAnimationFrameStats(&stats);
+    if (err < 0 && err != NO_INIT) {
+        doThrowIAE(env);
+    }
+
+    // The other end is not ready, fine just return empty stats.
+    if (err == NO_INIT) {
+        return JNI_FALSE;
+    }
+
+    jlong refreshPeriodNano = static_cast<jlong>(stats.refreshPeriodNano);
+    size_t frameCount = stats.desiredPresentTimesNano.size();
+
+    jlongArray presentedTimesNanoDst = env->NewLongArray(frameCount);
+    if (presentedTimesNanoDst == NULL) {
+        return JNI_FALSE;
+    }
+
+    nsecs_t presentedTimesNanoSrc[frameCount];
+
+    for (size_t i = 0; i < frameCount; i++) {
+        nsecs_t presentedTimeNano = stats.desiredPresentTimesNano[i];
+        if (presentedTimeNano == INT64_MAX) {
+            presentedTimeNano = gWindowContentFrameStatsClassInfo.UNDEFINED_TIME_NANO;
+        }
+        presentedTimesNanoSrc[i] = presentedTimeNano;
+    }
+
+    env->SetLongArrayRegion(presentedTimesNanoDst, 0, frameCount, presentedTimesNanoSrc);
+
+    env->CallVoidMethod(outStats, gWindowAnimationFrameStatsClassInfo.init, refreshPeriodNano,
+            presentedTimesNanoDst);
+
+    if (env->ExceptionCheck()) {
+        return JNI_FALSE;
+    }
+
+    return JNI_TRUE;
+}
+
 // ----------------------------------------------------------------------------
 
 static JNINativeMethod sSurfaceControlMethods[] = {
@@ -426,6 +582,14 @@
             (void*)nativeBlankDisplay },
     {"nativeUnblankDisplay", "(Landroid/os/IBinder;)V",
             (void*)nativeUnblankDisplay },
+    {"nativeClearContentFrameStats", "(J)Z",
+            (void*)nativeClearContentFrameStats },
+    {"nativeGetContentFrameStats", "(JLandroid/view/WindowContentFrameStats;)Z",
+            (void*)nativeGetContentFrameStats },
+    {"nativeClearAnimationFrameStats", "()Z",
+            (void*)nativeClearAnimationFrameStats },
+    {"nativeGetAnimationFrameStats", "(Landroid/view/WindowAnimationFrameStats;)Z",
+            (void*)nativeGetAnimationFrameStats },
 };
 
 int register_android_view_SurfaceControl(JNIEnv* env)
@@ -441,6 +605,19 @@
     gPhysicalDisplayInfoClassInfo.xDpi = env->GetFieldID(clazz, "xDpi", "F");
     gPhysicalDisplayInfoClassInfo.yDpi = env->GetFieldID(clazz, "yDpi", "F");
     gPhysicalDisplayInfoClassInfo.secure = env->GetFieldID(clazz, "secure", "Z");
+
+    jclass frameStatsClazz = env->FindClass("android/view/FrameStats");
+    jfieldID undefined_time_nano_field =  env->GetStaticFieldID(frameStatsClazz, "UNDEFINED_TIME_NANO", "J");
+    nsecs_t undefined_time_nano = env->GetStaticLongField(frameStatsClazz, undefined_time_nano_field);
+
+    jclass contFrameStatsClazz = env->FindClass("android/view/WindowContentFrameStats");
+    gWindowContentFrameStatsClassInfo.init =  env->GetMethodID(contFrameStatsClazz, "init", "(J[J[J[J)V");
+    gWindowContentFrameStatsClassInfo.UNDEFINED_TIME_NANO = undefined_time_nano;
+
+    jclass animFrameStatsClazz = env->FindClass("android/view/WindowAnimationFrameStats");
+    gWindowAnimationFrameStatsClassInfo.init =  env->GetMethodID(animFrameStatsClazz, "init", "(J[J)V");
+    gWindowAnimationFrameStatsClassInfo.UNDEFINED_TIME_NANO = undefined_time_nano;
+
     return err;
 }
 
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 0f772f1..a83942f 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -1921,6 +1921,18 @@
         android:description="@string/permdesc_filter_events"
         android:protectionLevel="signature" />
 
+    <!-- @hide Allows an application to retrieve the window token from the accessibility manager. -->
+    <permission android:name="android.permission.RETRIEVE_WINDOW_TOKEN"
+        android:label="@string/permlab_retrieveWindowToken"
+        android:description="@string/permdesc_retrieveWindowToken"
+        android:protectionLevel="signature" />
+
+    <!-- @hide Allows an application to collect frame statistics -->
+    <permission android:name="android.permission.FRAME_STATS"
+         android:label="@string/permlab_frameStats"
+         android:description="@string/permdesc_frameStats"
+         android:protectionLevel="signature" />
+
     <!-- @hide Allows an application to temporary enable accessibility on the device. -->
     <permission android:name="android.permission.TEMPORARY_ENABLE_ACCESSIBILITY"
         android:label="@string/permlab_temporary_enable_accessibility"
diff --git a/core/res/res/values/strings.xml b/core/res/res/values/strings.xml
index 4a121d1..6266393 100644
--- a/core/res/res/values/strings.xml
+++ b/core/res/res/values/strings.xml
@@ -830,6 +830,20 @@
          user consent.</string>
 
     <!-- Title of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
+    <string name="permlab_retrieveWindowToken">retrieve window token</string>
+    <!-- Description of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
+    <string name="permdesc_retrieveWindowToken">Allows an application to retrieve
+        the window token. Malicious apps may perfrom unauthorized interaction with
+        the application window impersonating the system.</string>
+
+    <!-- Title of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
+    <string name="permlab_frameStats">retrieve frame statistics</string>
+    <!-- Description of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
+    <string name="permdesc_frameStats">Allows an application to collect
+        frame statistics. Malicious apps may observe the frame statistics
+        of windows from other apps.</string>
+
+    <!-- Title of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
     <string name="permlab_filter_events">filter events</string>
     <!-- Description of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
     <string name="permdesc_filter_events">Allows an application to register an input filter
diff --git a/packages/Shell/AndroidManifest.xml b/packages/Shell/AndroidManifest.xml
index 19286c8..e1c17cb 100644
--- a/packages/Shell/AndroidManifest.xml
+++ b/packages/Shell/AndroidManifest.xml
@@ -87,6 +87,8 @@
     <uses-permission android:name="android.permission.MANAGE_USERS" />
     <uses-permission android:name="android.permission.BLUETOOTH_STACK" />
     <uses-permission android:name="android.permission.GET_ACCOUNTS" />
+    <uses-permission android:name="android.permission.RETRIEVE_WINDOW_TOKEN" />
+    <uses-permission android:name="android.permission.RENDER_STATS" />
 
     <application android:label="@string/app_label">
         <provider
diff --git a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
index c3db55e..53ac063 100644
--- a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
+++ b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
@@ -132,6 +132,8 @@
     private static final String TEMPORARY_ENABLE_ACCESSIBILITY_UNTIL_KEYGUARD_REMOVED =
             "temporaryEnableAccessibilityStateUntilKeyguardRemoved";
 
+    private static final String GET_WINDOW_TOKEN = "getWindowToken";
+
     private static final ComponentName sFakeAccessibilityServiceComponentName =
             new ComponentName("foo.bar", "FakeService");
 
@@ -360,6 +362,7 @@
         }, UserHandle.ALL, intentFilter, null, null);
     }
 
+    @Override
     public int addClient(IAccessibilityManagerClient client, int userId) {
         synchronized (mLock) {
             final int resolvedUserId = mSecurityPolicy
@@ -388,6 +391,7 @@
         }
     }
 
+    @Override
     public boolean sendAccessibilityEvent(AccessibilityEvent event, int userId) {
         synchronized (mLock) {
             final int resolvedUserId = mSecurityPolicy
@@ -412,6 +416,7 @@
         return (OWN_PROCESS_ID != Binder.getCallingPid());
     }
 
+    @Override
     public List<AccessibilityServiceInfo> getInstalledAccessibilityServiceList(int userId) {
         synchronized (mLock) {
             final int resolvedUserId = mSecurityPolicy
@@ -430,6 +435,7 @@
         }
     }
 
+    @Override
     public List<AccessibilityServiceInfo> getEnabledAccessibilityServiceList(int feedbackType,
             int userId) {
         List<AccessibilityServiceInfo> result = null;
@@ -463,6 +469,7 @@
         return result;
     }
 
+    @Override
     public void interrupt(int userId) {
         CopyOnWriteArrayList<Service> services;
         synchronized (mLock) {
@@ -485,6 +492,7 @@
         }
     }
 
+    @Override
     public int addAccessibilityInteractionConnection(IWindow windowToken,
             IAccessibilityInteractionConnection connection, int userId) throws RemoteException {
         synchronized (mLock) {
@@ -521,6 +529,7 @@
         }
     }
 
+    @Override
     public void removeAccessibilityInteractionConnection(IWindow window) {
         synchronized (mLock) {
             mSecurityPolicy.resolveCallingUserIdEnforcingPermissionsLocked(
@@ -570,6 +579,7 @@
         return -1;
     }
 
+    @Override
     public void registerUiTestAutomationService(IBinder owner,
             IAccessibilityServiceClient serviceClient,
             AccessibilityServiceInfo accessibilityServiceInfo) {
@@ -612,6 +622,7 @@
         }
     }
 
+    @Override
     public void unregisterUiTestAutomationService(IAccessibilityServiceClient serviceClient) {
         synchronized (mLock) {
             UserState userState = getCurrentUserStateLocked();
@@ -630,6 +641,7 @@
         }
     }
 
+    @Override
     public void temporaryEnableAccessibilityStateUntilKeyguardRemoved(
             ComponentName service, boolean touchExplorationEnabled) {
         mSecurityPolicy.enforceCallingPermission(
@@ -662,6 +674,29 @@
         }
     }
 
+    @Override
+    public IBinder getWindowToken(int windowId) {
+        mSecurityPolicy.enforceCallingPermission(
+                Manifest.permission.RETRIEVE_WINDOW_TOKEN,
+                GET_WINDOW_TOKEN);
+        synchronized (mLock) {
+            final int resolvedUserId = mSecurityPolicy
+                    .resolveCallingUserIdEnforcingPermissionsLocked(
+                            UserHandle.getCallingUserId());
+            if (resolvedUserId != mCurrentUserId) {
+                return null;
+            }
+            if (mSecurityPolicy.findWindowById(windowId) == null) {
+                return null;
+            }
+            IBinder token = mGlobalWindowTokens.get(windowId);
+            if (token != null) {
+                return token;
+            }
+            return getCurrentUserStateLocked().mWindowTokens.get(windowId);
+        }
+    }
+
     boolean onGesture(int gestureId) {
         synchronized (mLock) {
             boolean handled = notifyGestureLocked(gestureId, false);
@@ -689,7 +724,7 @@
      * @param outBounds The output to which to write the focus bounds.
      * @return Whether accessibility focus was found and the bounds are populated.
      */
-    // TODO: (multi-display) Make sure this works for multiple displays. 
+    // TODO: (multi-display) Make sure this works for multiple displays.
     boolean getAccessibilityFocusBoundsInActiveWindow(Rect outBounds) {
         // Instead of keeping track of accessibility focus events per
         // window to be able to find the focus in the active window,
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index b12ae4f..c24f53f 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -24,6 +24,7 @@
 import android.util.TimeUtils;
 import android.view.IWindowId;
 
+import android.view.WindowContentFrameStats;
 import com.android.internal.app.IBatteryStats;
 import com.android.internal.policy.PolicyManager;
 import com.android.internal.policy.impl.PhoneWindowManager;
@@ -626,6 +627,8 @@
 
     private final PointerEventDispatcher mPointerEventDispatcher;
 
+    private WindowContentFrameStats mTempWindowRenderStats;
+
     final class DragInputEventReceiver extends InputEventReceiver {
         public DragInputEventReceiver(InputChannel inputChannel, Looper looper) {
             super(inputChannel, looper);
@@ -10264,6 +10267,51 @@
         return mSafeMode;
     }
 
+    @Override
+    public boolean clearWindowContentFrameStats(IBinder token) {
+        if (!checkCallingPermission(Manifest.permission.FRAME_STATS,
+                "clearWindowContentFrameStats()")) {
+            throw new SecurityException("Requires FRAME_STATS permission");
+        }
+        synchronized (mWindowMap) {
+            WindowState windowState = mWindowMap.get(token);
+            if (windowState == null) {
+                return false;
+            }
+            SurfaceControl surfaceControl = windowState.mWinAnimator.mSurfaceControl;
+            if (surfaceControl == null) {
+                return false;
+            }
+            return surfaceControl.clearContentFrameStats();
+        }
+    }
+
+    @Override
+    public WindowContentFrameStats getWindowContentFrameStats(IBinder token) {
+        if (!checkCallingPermission(Manifest.permission.FRAME_STATS,
+                "getWindowContentFrameStats()")) {
+            throw new SecurityException("Requires FRAME_STATS permission");
+        }
+        synchronized (mWindowMap) {
+            WindowState windowState = mWindowMap.get(token);
+            if (windowState == null) {
+                return null;
+            }
+            SurfaceControl surfaceControl = windowState.mWinAnimator.mSurfaceControl;
+            if (surfaceControl == null) {
+                return null;
+            }
+            if (mTempWindowRenderStats == null) {
+                mTempWindowRenderStats = new WindowContentFrameStats();
+            }
+            WindowContentFrameStats stats = mTempWindowRenderStats;
+            if (!surfaceControl.getContentFrameStats(stats)) {
+                return null;
+            }
+            return stats;
+        }
+    }
+
     void dumpPolicyLocked(PrintWriter pw, String[] args, boolean dumpAll) {
         pw.println("WINDOW MANAGER POLICY STATE (dumpsys window policy)");
         mPolicy.dump("    ", pw, args);
diff --git a/tools/layoutlib/bridge/src/android/view/IWindowManagerImpl.java b/tools/layoutlib/bridge/src/android/view/IWindowManagerImpl.java
index 743a26c..1f2342a 100644
--- a/tools/layoutlib/bridge/src/android/view/IWindowManagerImpl.java
+++ b/tools/layoutlib/bridge/src/android/view/IWindowManagerImpl.java
@@ -23,22 +23,11 @@
 import android.content.res.CompatibilityInfo;
 import android.content.res.Configuration;
 import android.graphics.Bitmap;
-import android.graphics.Rect;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.os.IRemoteCallback;
 import android.os.RemoteException;
 import android.util.DisplayMetrics;
-import android.view.Display;
-import android.view.Gravity;
-import android.view.IApplicationToken;
-import android.view.IInputFilter;
-import android.view.IOnKeyguardExitResult;
-import android.view.IRotationWatcher;
-import android.view.IWindowManager;
-import android.view.IWindowSession;
-
-import java.util.List;
 
 /**
  * Basic implementation of {@link IWindowManager} so that {@link Display} (and
@@ -462,4 +451,16 @@
         // TODO Auto-generated method stub
         return false;
     }
+
+    @Override
+    public boolean clearWindowContentRenderStats(IBinder token) {
+        // TODO Auto-generated method stub
+        return false;
+    }
+
+    @Override
+    public WindowContentFrameStats getWindowContentRenderStats(IBinder token) {
+        // TODO Auto-generated method stub
+        return null;
+    }
 }