diff --git a/core/java/android/widget/StackView.java b/core/java/android/widget/StackView.java
index 1b9055c..6cc86b9 100644
--- a/core/java/android/widget/StackView.java
+++ b/core/java/android/widget/StackView.java
@@ -28,7 +28,6 @@
 import android.graphics.PorterDuffXfermode;
 import android.graphics.Rect;
 import android.graphics.RectF;
-import android.graphics.Region;
 import android.graphics.TableMaskFilter;
 import android.os.Bundle;
 import android.util.AttributeSet;
@@ -550,8 +549,8 @@
 
         // We only expand the clip bounds if necessary.
         if (expandClipRegion) {
-            canvas.save(Canvas.CLIP_SAVE_FLAG);
-            canvas.clipRect(stackInvalidateRect, Region.Op.UNION);
+            canvas.save();
+            canvas.clipRectUnion(stackInvalidateRect);
             super.dispatchDraw(canvas);
             canvas.restore();
         } else {
diff --git a/graphics/java/android/graphics/Canvas.java b/graphics/java/android/graphics/Canvas.java
index 3cc92bc..a465eea 100644
--- a/graphics/java/android/graphics/Canvas.java
+++ b/graphics/java/android/graphics/Canvas.java
@@ -829,6 +829,17 @@
     }
 
     /**
+     * DON'T USE THIS METHOD.  It exists only to support a particular legacy behavior in
+     * the view system and will be removed as soon as that code is refactored to no longer
+     * depend on this behavior.
+     * @hide
+     */
+    public boolean clipRectUnion(@NonNull Rect rect) {
+        return nClipRect(mNativeCanvasWrapper, rect.left, rect.top, rect.right, rect.bottom,
+                Region.Op.UNION.nativeInt);
+    }
+
+    /**
      * Intersect the current clip with the specified rectangle, which is
      * expressed in local coordinates.
      *