Perform full gcs when context disposals happen too frequent.

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 4463 matching lines @@
    */
   bool IdleNotification(int idle_time_in_ms);
 
   /**
    * Optional notification that the system is running low on memory.
    * V8 uses these notifications to attempt to free memory.
    */
   void LowMemoryNotification();
 
   /**
-   * Optional notification that a context has been disposed. V8 uses
-   * these notifications to guide the GC heuristic. Returns the number
-   * of context disposals - including this one - since the last time
-   * V8 had a chance to clean up.
+   * Optional notification that a context has been disposed. This may trigger
+   * a full garbage collection if invoked too frequently.
    */
-  int ContextDisposedNotification();
+  void ContextDisposedNotification();
 
  private:
   template<class K, class V, class Traits> friend class PersistentValueMap;
 
   Isolate();
   Isolate(const Isolate&);
   ~Isolate();
   Isolate& operator=(const Isolate&);
   void* operator new(size_t size);
   void operator delete(void*, size_t);
@@ skipping 2229 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_