Oilpan: move page's ValidationMessageClient to the heap.

Source/web/ValidationMessageClientImpl.h

 /*
  * Copyright (C) 2012 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 11 matching lines @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #ifndef ValidationMessageClientImpl_h
 #define ValidationMessageClientImpl_h
 
 #include "core/page/ValidationMessageClient.h"
 #include "platform/Timer.h"
 #include "platform/geometry/IntRect.h"
+#include "platform/heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 class FrameView;
 }
 
 namespace blink {
 
 class WebViewImpl;
 
-class ValidationMessageClientImpl FINAL : public WebCore::ValidationMessageClient {
+class ValidationMessageClientImpl FINAL : public NoBaseWillBeGarbageCollectedFinalized<ValidationMessageClientImpl>, public WebCore::ValidationMessageClient {
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ValidationMessageClientImpl);
 public:
-    static PassOwnPtr<ValidationMessageClientImpl> create(WebViewImpl&);
+    static PassOwnPtrWillBeRawPtr<ValidationMessageClientImpl> create(WebViewImpl&);
     virtual ~ValidationMessageClientImpl();
 
+    virtual void trace(WebCore::Visitor*) OVERRIDE;
+
 private:
     ValidationMessageClientImpl(WebViewImpl&);
     void checkAnchorStatus(WebCore::Timer<ValidationMessageClientImpl>*);
     WebCore::FrameView* currentView();
 
     virtual void showValidationMessage(const WebCore::Element& anchor, const String& message) OVERRIDE;
     virtual void hideValidationMessage(const WebCore::Element& anchor) OVERRIDE;
     virtual bool isValidationMessageVisible(const WebCore::Element& anchor) OVERRIDE;
     virtual void documentDetached(const WebCore::Document&) OVERRIDE;
     virtual void willBeDestroyed() OVERRIDE;
 
     WebViewImpl& m_webView;
-    const WebCore::Element* m_currentAnchor;
+    RawPtrWillBeMember<const WebCore::Element> m_currentAnchor;
     String m_message;
     WebCore::IntRect m_lastAnchorRectInScreen;
     float m_lastPageScaleFactor;
     double m_finishTime;
     WebCore::Timer<ValidationMessageClientImpl> m_timer;
 };
 
 }
 
 #endif