[Invalidation Tracking] add TraceEvents for setNeedsStyleRecalc.

Source/core/inspector/InspectorTraceEvents.h

Index: Source/core/inspector/InspectorTraceEvents.h
diff --git a/Source/core/inspector/InspectorTraceEvents.h b/Source/core/inspector/InspectorTraceEvents.h
index 24ffa7165b1b645695ea0218bd59f291906ed4e1..944069973d0bfe8b8f5ae1bee3af8d639fac9805 100644
--- a/Source/core/inspector/InspectorTraceEvents.h
+++ b/Source/core/inspector/InspectorTraceEvents.h
@@ -20,13 +20,15 @@ class GraphicsLayer;
 class KURL;
 class LayoutRect;
 class LocalFrame;
+class Node;
 class RenderImage;
 class RenderLayer;
 class RenderObject;
 class ResourceRequest;
 class ResourceResponse;
-class ScriptSourceCode;
 class ScriptCallStack;
+class ScriptSourceCode;
+class StyleChangeReasonForTracing;
 class WorkerThread;
 class XMLHttpRequest;
 
@@ -36,6 +38,11 @@ public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> endData(RenderObject* rootForThisLayout);
 };
 
+class InspectorStyleRecalcInvalidationTrackingEvent {
+public:
+    static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(Node*, const StyleChangeReasonForTracing&);
+};
+
 class InspectorLayoutInvalidationTrackingEvent {
 public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(const RenderObject*);