[Invalidation Tracking] add TraceEvents for setNeedsStyleRecalc.

Source/core/dom/Node.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 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
@@ skipping 756 matching lines @@
     document().scheduleRenderTreeUpdateIfNeeded();
 }
 
 void Node::setNeedsStyleRecalc(StyleChangeType changeType, const StyleChangeReasonForTracing& reason)
 {
     ASSERT(changeType != NoStyleChange);
     if (!inActiveDocument())
         return;
 
     StyleChangeType existingChangeType = styleChangeType();
     if (changeType > existingChangeType) {

[pdr., 2014/09/30 01:51:20]

We may want to do this for all changes, not just ones with changeType >
existingChangeType.

[kouhei (in TOK), 2014/09/30 02:01:54]

Done.

         setStyleChange(changeType);
-        if (changeType >= SubtreeStyleChange)
+        if (changeType >= SubtreeStyleChange) {

[pdr., 2014/09/30 01:51:20]

Is this correct? What about LocalStyleChanges?

[kouhei (in TOK), 2014/09/30 02:01:54]

Done.

+            TRACE_EVENT_INSTANT1(
+                TRACE_DISABLED_BY_DEFAULT("devtools.timeline.invalidationTracking"),
+                "StyleRecalcInvalidationTracking",
+                "data",
+                InspectorStyleRecalcInvalidationTrackingEvent::data(this, reason));
+
+            // FIXME: Remove below

[pdr., 2014/09/30 01:51:20]

Fixed! https://src.chromium.org/viewvc/blink?revision=182859&view=revision

[kouhei (in TOK), 2014/09/30 02:01:54]

Thanks!

             traceStyleChangeIfNeeded(changeType);
+        }
     }
 
     if (existingChangeType == NoStyleChange)
         markAncestorsWithChildNeedsStyleRecalc();
 
     if (isElementNode() && hasRareData())
         toElement(*this).setAnimationStyleChange(false);
 }
 
 void Node::clearNeedsStyleRecalc()
@@ skipping 1719 matching lines @@
         node->showTreeForThis();
 }
 
 void showNodePath(const blink::Node* node)
 {
     if (node)
         node->showNodePathForThis();
 }
 
 #endif