[Invalidation Tracking] add TraceEvents for setNeedsStyleRecalc.

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index 1bed367094b85dcc9f0c046efce4f527809850e2..057812ce82fb2e447b0131048ea59191cde71b18 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -776,8 +776,16 @@ void Node::setNeedsStyleRecalc(StyleChangeType changeType, const StyleChangeReas
     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)