Update the Idle collector to do a full GC

src/v8.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 82 matching lines @@
   static void SetFatalError();
 
   // Report process out of memory. Implementation found in api.cc.
   static void FatalProcessOutOfMemory(const char* location);
 
   // Random number generation support. Not cryptographically safe.
   static uint32_t Random();
   static Smi* RandomPositiveSmi();
 
   // Idle notification directly from the API.
-  static void IdleNotification(bool is_high_priority);
+  static bool IdleNotification(bool is_high_priority);
 
  private:
   // True if engine is currently running
   static bool is_running_;
   // True if V8 has ever been run
   static bool has_been_setup_;
   // True if error has been signaled for current engine
   // (reset to false if engine is restarted)
   static bool has_fatal_error_;
   // True if engine has been shut down
   // (reset if engine is restarted)
   static bool has_been_disposed_;
 };
 
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_V8_H_