Track reasons for |Node::SetNeedsStyleRecalc|

Source/core/page/Page.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 216 matching lines @@
 {
     m_openedByDOM = true;
 }
 
 void Page::scheduleForcedStyleRecalcForAllPages()
 {
     HashSet<Page*>::iterator end = allPages().end();
     for (HashSet<Page*>::iterator it = allPages().begin(); it != end; ++it)
         for (Frame* frame = (*it)->mainFrame(); frame; frame = frame->tree().traverseNext()) {
             if (frame->isLocalFrame())
-                toLocalFrame(frame)->document()->setNeedsStyleRecalc(SubtreeStyleChange);
+                toLocalFrame(frame)->document()->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::PlatformColorChange));
         }
 }
 
 void Page::setNeedsRecalcStyleInAllFrames()
 {
     for (Frame* frame = mainFrame(); frame; frame = frame->tree().traverseNext()) {
         if (frame->isLocalFrame())
             toLocalFrame(frame)->document()->styleResolverChanged();
     }
 }
@@ skipping 416 matching lines @@
     , spellCheckerClient(0)
     , storageClient(0)
 {
 }
 
 Page::PageClients::~PageClients()
 {
 }
 
 } // namespace blink