Oilpan: add missing tracing of Page::m_chromeClient.

third_party/WebKit/Source/core/page/Page.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 204 matching lines @@
 
     void setTimerAlignmentInterval(double);
 
     void setNeedsLayoutInAllFrames();
 
     // SettingsDelegate overrides.
     void settingsChanged(SettingsDelegate::ChangeType) override;
 
     RefPtrWillBeMember<PageAnimator> m_animator;
     const OwnPtrWillBeMember<AutoscrollController> m_autoscrollController;
-    ChromeClient* m_chromeClient;
+    RawPtrWillBeMember<ChromeClient> m_chromeClient;
     const OwnPtrWillBeMember<DragCaretController> m_dragCaretController;
     const OwnPtrWillBeMember<DragController> m_dragController;
     const OwnPtrWillBeMember<FocusController> m_focusController;
     const OwnPtrWillBeMember<ContextMenuController> m_contextMenuController;
     const OwnPtrWillBeMember<PointerLockController> m_pointerLockController;
     OwnPtrWillBeMember<ScrollingCoordinator> m_scrollingCoordinator;
     const OwnPtrWillBeMember<UndoStack> m_undoStack;
 
     // Typically, the main frame and Page should both be owned by the embedder,
     // which must call Page::willBeDestroyed() prior to destroying Page. This
@@ skipping 42 matching lines @@
     OwnPtrWillBeMember<FrameHost> m_frameHost;
 
     OwnPtrWillBeMember<MemoryPurgeController> m_memoryPurgeController;
 };
 
 extern template class CORE_EXTERN_TEMPLATE_EXPORT WillBeHeapSupplement<Page>;
 
 } // namespace blink
 
 #endif // Page_h