Drop V8RecursionScope dependency on ExecutionContext

Source/web/WebKit.cpp

 /*
  * Copyright (C) 2009 Google Inc. 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
@@ skipping 200 matching lines @@
         ASSERT(s_pendingGCRunner);
         delete s_pendingGCRunner;
         s_pendingGCRunner = 0;
 
         ASSERT(s_messageLoopInterruptor);
         ThreadState::current()->removeInterruptor(s_messageLoopInterruptor);
         delete s_messageLoopInterruptor;
         s_messageLoopInterruptor = 0;
     }
 
+    v8::Isolate* isolate = V8PerIsolateData::mainThreadIsolate();
+    V8PerIsolateData::willBeDestroyed(isolate);
+
     // Detach the main thread before starting the shutdown sequence
     // so that the main thread won't get involved in a GC during the shutdown.
     ThreadState::detachMainThread();
 
-    v8::Isolate* isolate = V8PerIsolateData::mainThreadIsolate();
-    V8PerIsolateData::dispose(isolate);
+    V8PerIsolateData::destroy(isolate);
     isolate->Exit();
     isolate->Dispose();
 
     shutdownWithoutV8();
 }
 
 void shutdownWithoutV8()
 {
     ASSERT(!s_endOfTaskRunner);
     CoreInitializer::shutdown();
@@ skipping 32 matching lines @@
         channel->state = WTFLogChannelOn;
 #endif // !LOG_DISABLED
 }
 
 void resetPluginCache(bool reloadPages)
 {
     Page::refreshPlugins(reloadPages);
 }
 
 } // namespace blink