Blink changes to record interest rects for http://w3c.github.io/frame-timing/

Source/core/timing/PerformanceEntry.h

Index: Source/core/timing/PerformanceEntry.h
diff --git a/Source/core/timing/PerformanceEntry.h b/Source/core/timing/PerformanceEntry.h
index f3d44faf65e112325b3595fa624c24cf3ecd9c56..074fe179ffcd2a60a7aa59e7319d40ecb442a1c3 100644
--- a/Source/core/timing/PerformanceEntry.h
+++ b/Source/core/timing/PerformanceEntry.h
@@ -49,6 +49,8 @@ public:
     double duration() const;
 
     virtual bool isResource() { return false; }
+    virtual bool isRender() { return false; }
+    virtual bool isComposite() { return false; }
     virtual bool isMark() { return false; }
     virtual bool isMeasure() { return false; }