Oilpan: extend tracing over WebFrame trees.

Source/web/WebRemoteFrameImpl.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 "web/WebRemoteFrameImpl.h"
 
 #include "core/frame/FrameOwner.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/RemoteFrame.h"
@@ skipping 114 matching lines @@
 #if ENABLE(OILPAN)
     , m_selfKeepAlive(this)
 #endif
 {
 }
 
 WebRemoteFrameImpl::~WebRemoteFrameImpl()
 {
 }
 
+#if ENABLE(OILPAN)
 void WebRemoteFrameImpl::trace(Visitor* visitor)
 {
-#if ENABLE(OILPAN)
     visitor->trace(m_frame);
     visitor->trace(m_ownersForChildren);
-
-    WebFrame::traceChildren(visitor, this);
+    visitor->registerWeakMembers<WebFrame, &WebFrame::clearWeakFrames>(this);
+    WebFrame::traceFrames(visitor, this);
+}
 #endif
-}
 
 bool WebRemoteFrameImpl::isWebLocalFrame() const
 {
     return false;
 }
 
 WebLocalFrame* WebRemoteFrameImpl::toWebLocalFrame()
 {
     ASSERT_NOT_REACHED();
     return 0;
@@ skipping 707 matching lines @@
 void WebRemoteFrameImpl::initializeFromFrame(WebLocalFrame* source) const
 {
     ASSERT(source);
     WebLocalFrameImpl* localFrameImpl = toWebLocalFrameImpl(source);
     client()->initializeChildFrame(
         localFrameImpl->frame()->view()->frameRect(),
         localFrameImpl->frame()->view()->visibleContentScaleFactor());
 }
 
 } // namespace blink