Oilpan: move WebDevToolsFrontend to the heap.

Source/web/WebLocalFrameImpl.h

 /*
  * 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 356 matching lines @@
     OwnPtrWillBeMember<ChromePrintContext> m_printContext;
 
     // Stores the additional input events offset and scale when device metrics emulation is enabled.
     IntSize m_inputEventsOffsetForEmulation;
     float m_inputEventsScaleFactorForEmulation;
 
     UserMediaClientImpl m_userMediaClientImpl;
 
     OwnPtrWillBeMember<GeolocationClientProxy> m_geolocationClientProxy;
 
-    WebDevToolsFrontendImpl* m_webDevToolsFrontend;
+    RawPtrWillBeMember<WebDevToolsFrontendImpl> m_webDevToolsFrontend;
 
 #if ENABLE(OILPAN)
     // Oilpan: to provide the guarantee of having the frame live until
     // close() is called, an instance keep a self-persistent. It is
     // cleared upon calling close(). This avoids having to assume that
     // an embedder's WebFrame references are all discovered via thread
     // state (stack, registers) should an Oilpan GC strike while we're
     // in the process of detaching.
     GC_PLUGIN_IGNORE("340522")
     Persistent<WebLocalFrameImpl> m_selfKeepAlive;
 #endif
 };
 
 DEFINE_TYPE_CASTS(WebLocalFrameImpl, WebFrame, frame, frame->isWebLocalFrame(), frame.isWebLocalFrame());
 
 } // namespace blink
 
 #endif