[not for review] Add Draw entries to window Performance Timeline

Source/core/timing/Performance.h

Index: Source/core/timing/Performance.h
diff --git a/Source/core/timing/Performance.h b/Source/core/timing/Performance.h
index bbba77e444209f2590f7825e2809bdb79be83db8..04126ca9f2b891930d0446357789160d38c10364 100644
--- a/Source/core/timing/Performance.h
+++ b/Source/core/timing/Performance.h
@@ -80,10 +80,17 @@ public:
     void webkitClearResourceTimings();
     void webkitSetResourceTimingBufferSize(unsigned);
 
+    void webkitClearDrawTimings();
+    void webkitSetDrawTimingBufferSize(unsigned);
+
     DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitresourcetimingbufferfull);
 
+    DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitdrawtimingbufferfull);
+
     void addResourceTiming(const ResourceTimingInfo&, Document*);
 
+    void addDrawTiming(Document*, unsigned, double);
+
     void mark(const String& markName, ExceptionState&);
     void clearMarks(const String& markName);
 
@@ -98,11 +105,16 @@ private:
     bool isResourceTimingBufferFull();
     void addResourceTimingBuffer(PassRefPtrWillBeRawPtr<PerformanceEntry>);
 
+    bool isDrawTimingBufferFull();
+    void addDrawTimingBuffer(PassRefPtrWillBeRawPtr<PerformanceEntry>);
+
     mutable RefPtrWillBeMember<PerformanceNavigation> m_navigation;
     mutable RefPtrWillBeMember<PerformanceTiming> m_timing;
 
     PerformanceEntryVector m_resourceTimingBuffer;
     unsigned m_resourceTimingBufferSize;
+    PerformanceEntryVector m_drawTimingBuffer;
+    unsigned m_drawTimingBufferSize;
     double m_referenceTime;
 
     RefPtrWillBeMember<UserTiming> m_userTiming;