diff --git a/include/v8-debug.h b/include/v8-debug.h
index f7b4fa1..c53b634 100644
--- a/include/v8-debug.h
+++ b/include/v8-debug.h
@@ -144,6 +144,39 @@
   
 
   /**
+   * An event details object passed to the debug event listener.
+   */
+  class EventDetails {
+   public:
+    /**
+     * Event type.
+     */
+    virtual DebugEvent GetEvent() const = 0;
+
+    /**
+     * Access to execution state and event data of the debug event. Don't store
+     * these cross callbacks as their content becomes invalid.
+     */
+    virtual Handle<Object> GetExecutionState() const = 0;
+    virtual Handle<Object> GetEventData() const = 0;
+
+    /**
+     * Get the context active when the debug event happened. Note this is not
+     * the current active context as the JavaScript part of the debugger is
+     * running in it's own context which is entered at this point.
+     */
+    virtual Handle<Context> GetEventContext() const = 0;
+
+    /**
+     * Client data passed with the corresponding callbak whet it was registered.
+     */
+    virtual Handle<Value> GetCallbackData() const = 0;
+
+    virtual ~EventDetails() {}
+  };
+
+
+  /**
    * Debug event callback function.
    *
    * \param event the type of the debug event that triggered the callback
@@ -157,6 +190,15 @@
                                 Handle<Object> event_data,
                                 Handle<Value> data);
 
+  /**
+   * Debug event callback function.
+   *
+   * \param event_details object providing information about the debug event
+   *
+   * A EventCallback2 does not take possession of the event data,
+   * and must not rely on the data persisting after the handler returns.
+   */
+  typedef void (*EventCallback2)(const EventDetails& event_details);
 
   /**
    * Debug message callback function.
@@ -165,7 +207,7 @@
    * \param length length of the message
    * \param client_data the data value passed when registering the message handler
 
-   * A MessageHandler does not take posession of the message string,
+   * A MessageHandler does not take possession of the message string,
    * and must not rely on the data persisting after the handler returns.
    *
    * This message handler is deprecated. Use MessageHandler2 instead.
@@ -178,7 +220,7 @@
    *
    * \param message the debug message handler message object
 
-   * A MessageHandler does not take posession of the message data,
+   * A MessageHandler does not take possession of the message data,
    * and must not rely on the data persisting after the handler returns.
    */
   typedef void (*MessageHandler2)(const Message& message);
@@ -196,6 +238,8 @@
   // Set a C debug event listener.
   static bool SetDebugEventListener(EventCallback that,
                                     Handle<Value> data = Handle<Value>());
+  static bool SetDebugEventListener2(EventCallback2 that,
+                                     Handle<Value> data = Handle<Value>());
 
   // Set a JavaScript debug event listener.
   static bool SetDebugEventListener(v8::Handle<v8::Object> that,
diff --git a/include/v8-profiler.h b/include/v8-profiler.h
index f1b8ffb..bb41072 100644
--- a/include/v8-profiler.h
+++ b/include/v8-profiler.h
@@ -140,22 +140,37 @@
 class V8EXPORT CpuProfiler {
  public:
   /**
+   * A note on security tokens usage. As scripts from different
+   * origins can run inside a single V8 instance, it is possible to
+   * have functions from different security contexts intermixed in a
+   * single CPU profile. To avoid exposing function names belonging to
+   * other contexts, filtering by security token is performed while
+   * obtaining profiling results.
+   */
+
+  /**
    * Returns the number of profiles collected (doesn't include
    * profiles that are being collected at the moment of call.)
    */
   static int GetProfilesCount();
 
   /** Returns a profile by index. */
-  static const CpuProfile* GetProfile(int index);
+  static const CpuProfile* GetProfile(
+      int index,
+      Handle<Value> security_token = Handle<Value>());
 
   /** Returns a profile by uid. */
-  static const CpuProfile* FindProfile(unsigned uid);
+  static const CpuProfile* FindProfile(
+      unsigned uid,
+      Handle<Value> security_token = Handle<Value>());
 
   /**
    * Starts collecting CPU profile. Title may be an empty string. It
    * is allowed to have several profiles being collected at
    * once. Attempts to start collecting several profiles with the same
-   * title are silently ignored.
+   * title are silently ignored. While collecting a profile, functions
+   * from all security contexts are included in it. The token-based
+   * filtering is only performed when querying for a profile.
    */
   static void StartProfiling(Handle<String> title);
 
@@ -163,7 +178,9 @@
    * Stops collecting CPU profile with a given title and returns it.
    * If the title given is empty, finishes the last profile started.
    */
-  static const CpuProfile* StopProfiling(Handle<String> title);
+  static const CpuProfile* StopProfiling(
+      Handle<String> title,
+      Handle<Value> security_token = Handle<Value>());
 };
 
 
diff --git a/include/v8.h b/include/v8.h
index eb12de8..5b5dabe 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -126,6 +126,7 @@
 class FunctionTemplate;
 class ObjectTemplate;
 class Data;
+class AccessorInfo;
 class StackTrace;
 class StackFrame;
 
@@ -512,11 +513,37 @@
 class V8EXPORT ScriptData {  // NOLINT
  public:
   virtual ~ScriptData() { }
+  /**
+   * Pre-compiles the specified script (context-independent).
+   *
+   * \param input Pointer to UTF-8 script source code.
+   * \param length Length of UTF-8 script source code.
+   */
   static ScriptData* PreCompile(const char* input, int length);
-  static ScriptData* New(unsigned* data, int length);
 
+  /**
+   * Load previous pre-compilation data.
+   *
+   * \param data Pointer to data returned by a call to Data() of a previous
+   *   ScriptData. Ownership is not transferred.
+   * \param length Length of data.
+   */
+  static ScriptData* New(const char* data, int length);
+
+  /**
+   * Returns the length of Data().
+   */
   virtual int Length() = 0;
-  virtual unsigned* Data() = 0;
+
+  /**
+   * Returns a serialized representation of this ScriptData that can later be
+   * passed to New(). NOTE: Serialized data is platform-dependent.
+   */
+  virtual const char* Data() = 0;
+
+  /**
+   * Returns true if the source code could not be parsed.
+   */
   virtual bool HasError() = 0;
 };
 
@@ -1306,6 +1333,41 @@
 };
 
 /**
+ * Accessor[Getter|Setter] are used as callback functions when
+ * setting|getting a particular property. See Object and ObjectTemplate's
+ * method SetAccessor.
+ */
+typedef Handle<Value> (*AccessorGetter)(Local<String> property,
+                                        const AccessorInfo& info);
+
+
+typedef void (*AccessorSetter)(Local<String> property,
+                               Local<Value> value,
+                               const AccessorInfo& info);
+
+
+/**
+ * Access control specifications.
+ *
+ * Some accessors should be accessible across contexts.  These
+ * accessors have an explicit access control parameter which specifies
+ * the kind of cross-context access that should be allowed.
+ *
+ * Additionally, for security, accessors can prohibit overwriting by
+ * accessors defined in JavaScript.  For objects that have such
+ * accessors either locally or in their prototype chain it is not
+ * possible to overwrite the accessor by using __defineGetter__ or
+ * __defineSetter__ from JavaScript code.
+ */
+enum AccessControl {
+  DEFAULT               = 0,
+  ALL_CAN_READ          = 1,
+  ALL_CAN_WRITE         = 1 << 1,
+  PROHIBITS_OVERWRITING = 1 << 2
+};
+
+
+/**
  * A JavaScript object (ECMA-262, 4.3.3)
  */
 class V8EXPORT Object : public Value {
@@ -1347,6 +1409,13 @@
 
   bool Delete(uint32_t index);
 
+  bool SetAccessor(Handle<String> name,
+                   AccessorGetter getter,
+                   AccessorSetter setter = 0,
+                   Handle<Value> data = Handle<Value>(),
+                   AccessControl settings = DEFAULT,
+                   PropertyAttribute attribute = None);
+
   /**
    * Returns an array containing the names of the enumerable properties
    * of this object, including properties from prototype objects.  The
@@ -1642,19 +1711,6 @@
 typedef int (*LookupCallback)(Local<Object> self, Local<String> name);
 
 /**
- * Accessor[Getter|Setter] are used as callback functions when
- * setting|getting a particular property. See objectTemplate::SetAccessor.
- */
-typedef Handle<Value> (*AccessorGetter)(Local<String> property,
-                                        const AccessorInfo& info);
-
-
-typedef void (*AccessorSetter)(Local<String> property,
-                               Local<Value> value,
-                               const AccessorInfo& info);
-
-
-/**
  * NamedProperty[Getter|Setter] are used as interceptors on object.
  * See ObjectTemplate::SetNamedPropertyHandler.
  */
@@ -1734,27 +1790,6 @@
 
 
 /**
- * Access control specifications.
- *
- * Some accessors should be accessible across contexts.  These
- * accessors have an explicit access control parameter which specifies
- * the kind of cross-context access that should be allowed.
- *
- * Additionally, for security, accessors can prohibit overwriting by
- * accessors defined in JavaScript.  For objects that have such
- * accessors either locally or in their prototype chain it is not
- * possible to overwrite the accessor by using __defineGetter__ or
- * __defineSetter__ from JavaScript code.
- */
-enum AccessControl {
-  DEFAULT               = 0,
-  ALL_CAN_READ          = 1,
-  ALL_CAN_WRITE         = 1 << 1,
-  PROHIBITS_OVERWRITING = 1 << 2
-};
-
-
-/**
  * Access type specification.
  */
 enum AccessType {
@@ -2866,7 +2901,12 @@
    */
   void ReattachGlobal(Handle<Object> global_object);
 
-  /** Creates a new context. */
+  /** Creates a new context.
+   *
+   * Returns a persistent handle to the newly allocated context. This
+   * persistent handle has to be disposed when the context is no
+   * longer used so the context can be garbage collected.
+   */
   static Persistent<Context> New(
       ExtensionConfiguration* extensions = NULL,
       Handle<ObjectTemplate> global_template = Handle<ObjectTemplate>(),