Move the Widget hierarchy to the Oilpan heap.

Source/core/frame/RemoteFrameView.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/frame/RemoteFrameView.h"
 
 #include "core/frame/RemoteFrame.h"
 #include "core/rendering/RenderPart.h"
 
 namespace blink {
 
 RemoteFrameView::RemoteFrameView(RemoteFrame* remoteFrame)
     : m_remoteFrame(remoteFrame)
 {
     ASSERT(remoteFrame);
 }
 
 RemoteFrameView::~RemoteFrameView()
 {
 }
 
-PassRefPtr<RemoteFrameView> RemoteFrameView::create(RemoteFrame* remoteFrame)
+PassRefPtrWillBeRawPtr<RemoteFrameView> RemoteFrameView::create(RemoteFrame* remoteFrame)
 {
-    RefPtr<RemoteFrameView> view = adoptRef(new RemoteFrameView(remoteFrame));
+    RefPtrWillBeRawPtr<RemoteFrameView> view = adoptRefWillBeNoop(new RemoteFrameView(remoteFrame));
     view->show();
     return view.release();
 }
 
 void RemoteFrameView::invalidateRect(const IntRect& rect)
 {
     RenderPart* renderer = m_remoteFrame->ownerRenderer();
     if (!renderer)
         return;
 
@@ skipping 13 matching lines @@
     Widget::setFrameRect(newRect);
 
     frameRectsChanged();
 }
 
 void RemoteFrameView::frameRectsChanged()
 {
     // FIXME: Notify embedder via WebLocalFrameClient when that is possible.
 }
 
+void RemoteFrameView::trace(Visitor* visitor)
+{
+    visitor->trace(m_remoteFrame);
+    Widget::trace(visitor);
+}
+
 } // namespace blink