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 8e559c59776d5138985f2ffb019a5cabc4eea434..aba66c9fbaed41326c8d43a12f184878d2e912e1 100644
--- a/Source/core/timing/PerformanceEntry.h
+++ b/Source/core/timing/PerformanceEntry.h
@@ -51,6 +51,8 @@ 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; }