DOM wrappers that are not retained from Dart should be collected.

Source/WebCore/bindings/dart/DartController.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 79 matching lines @@
     Dart_SetMessageNotifyCallback(&messageNotifyCallback);
     initDOMIsolate();
     Dart_ExitIsolate();
 
     DartUtilities::registerDOMIsolate(isolate, applicationLoader, document);
     RefPtr<DartIsolate> dartIsolate = DartIsolate::create(isolate);
     DartDebugServer::shared().registerIsolate(dartIsolate.get());
     return dartIsolate.release();
 }
 
-void DartController::shutdownIsolate(DartIsolate* isolate)
-{
-    Dart_Isolate currentIsolate = Dart_CurrentIsolate();
-    if (currentIsolate)
-        Dart_ExitIsolate();
-    Dart_EnterIsolate(isolate->isolate());
-    Dart_ShutdownIsolate();
-    if (currentIsolate)
-        Dart_EnterIsolate(currentIsolate);
-
-    *DartUtilities::recursionForIsolate(isolate->isolate()) = 0;
-    DartUtilities::unregisterIsolate(isolate->isolate());
-    DartDebugServer::shared().unregisterIsolate(isolate);
-}
-
 DartController::DartController(Frame* frame)
     : m_frame(frame)
     , m_scriptsLoaded(false)
     , m_isolates()
     , m_npObjectMap()
 {
     // The DartController's constructor must be called in the Frame's
     // constructor, so it can properly maintain the unit of related
     // browsing contexts.
 
     // The DartController must be created after the frame's loader and
     // tree nodes are initialized.
     ASSERT(frame->loader());
     ASSERT(frame->tree());
 }
 
 void DartController::clearWindowShell()
 {
     m_scriptsLoaded = false;
-
-    for (size_t i = 0; i < m_isolates.size(); ++i) {
-        DartIsolate::Scope scope(m_isolates[i]);
-        // FIXME: clear event listeners.
-        // FIXME: clear console messages.
-        DartDOMMap* domMap = DartUtilities::domMapForCurrentIsolate();
-        for (DartDOMMap::iterator it = domMap->begin(); it != domMap->end(); ++it)
-            DartDOMWrapper::derefDOMObject(it->second, it->first);
-    }
-
     m_isolates.clear();
 }
 
 class MessageNotifyTask : public ScriptExecutionContext::Task {
 public:
     explicit MessageNotifyTask(PassRefPtr<DartIsolate> destinationIsolate)
         : m_destinationIsolate(destinationIsolate)
     { }
 
     virtual void performTask(ScriptExecutionContext* context)
@@ skipping 353 matching lines @@
 }
 
 DartController* DartController::retrieve(ScriptExecutionContext* context)
 {
     if (!context || !context->isDocument())
         return 0;
     return retrieve(static_cast<Document*>(context)->frame());
 }
 
 }