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

Source/core/timing/PerformanceEntry.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 33 matching lines @@
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~PerformanceEntry();
 
     String name() const;
     String entryType() const;
     double startTime() const;
     double duration() const;
 
     virtual bool isResource() { return false; }
+    virtual bool isSmoothness() { return false; }
     virtual bool isMark() { return false; }
     virtual bool isMeasure() { return false; }
 
     static bool startTimeCompareLessThan(PassRefPtrWillBeRawPtr<PerformanceEntry> a, PassRefPtrWillBeRawPtr<PerformanceEntry> b)
     {
         return a->startTime() < b->startTime();
     }
 
     virtual void trace(Visitor*) { }
 
 protected:
     PerformanceEntry(const String& name, const String& entryType, double startTime, double finishTime);
 
 private:
     const String m_name;
     const String m_entryType;
     const double m_startTime;
     const double m_duration;
 };
 
 } // namespace blink
 
 #endif // PerformanceEntry_h