Turn off computation of the interest rect in cc in synchronized paint mode.

third_party/WebKit/Source/web/LinkHighlightImpl.cpp

 /*
  * 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
@@ skipping 35 matching lines @@
 #include "public/platform/WebDisplayItemList.h"
 #include "public/platform/WebFloatAnimationCurve.h"
 #include "public/platform/WebFloatPoint.h"
 #include "public/platform/WebLayer.h"
 #include "public/platform/WebRect.h"
 #include "public/platform/WebSize.h"
 #include "public/web/WebKit.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkPictureRecorder.h"
 #include "third_party/skia/include/utils/SkMatrix44.h"
+#include "ui/gfx/geometry/rect.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WebSettingsImpl.h"
 #include "web/WebViewImpl.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 PassOwnPtr<LinkHighlightImpl> LinkHighlightImpl::create(Node* node, WebViewImpl* owningWebViewImpl)
 {
@@ skipping 187 matching lines @@
     if (pathHasChanged) {
         m_path = newPath;
         m_contentLayer->layer()->setBounds(enclosingIntRect(boundingRect).size());
     }
 
     m_contentLayer->layer()->setPosition(boundingRect.location());
 
     return pathHasChanged;
 }
 
+gfx::Rect LinkHighlightImpl::paintableRegion()
+{
+    return gfx::Rect(0, 0, contentLayer()->layer()->bounds().width, contentLayer()->layer()->bounds().height);
+}
+
 void LinkHighlightImpl::paintContents(WebDisplayItemList* webDisplayItemList, const WebRect& webClipRect, WebContentLayerClient::PaintingControlSetting paintingControl)
 {
     if (!m_node || !m_node->layoutObject())
         return;
 
     SkPictureRecorder recorder;
     SkCanvas* canvas = recorder.beginRecording(webClipRect.width, webClipRect.height);
     canvas->translate(-webClipRect.x, -webClipRect.y);
 
     SkPaint paint;
@@ skipping 106 matching lines @@
 {
     return clipLayer();
 }
 
 WebCompositorAnimationPlayer* LinkHighlightImpl::compositorPlayer() const
 {
     return m_compositorPlayer.get();
 }
 
 } // namespace blink