Add Gpu Tracing to Ganesh

src/gpu/gl/GrGpuGL.h

Index: src/gpu/gl/GrGpuGL.h
diff --git a/src/gpu/gl/GrGpuGL.h b/src/gpu/gl/GrGpuGL.h
index 9c823f90abe20187889e73ebc326d413c67ed3e7..574bf24c09245a148e91bb6e6131af0e76a2c41e 100644
--- a/src/gpu/gl/GrGpuGL.h
+++ b/src/gpu/gl/GrGpuGL.h
@@ -166,10 +166,8 @@ private:
     virtual bool flushGraphicsState(DrawType, const GrDeviceCoordTexture* dstCopy) SK_OVERRIDE;
 
     // GrDrawTarget ovverides
-    virtual void onInstantGpuTraceEvent(const char* marker) SK_OVERRIDE;
-    virtual void onPushGpuTraceEvent(const char* marker) SK_OVERRIDE;
-    virtual void onPopGpuTraceEvent() SK_OVERRIDE;
-
+    virtual void didAddGpuTraceMarker() SK_OVERRIDE;
+    virtual void didRemoveGpuTraceMarker() SK_OVERRIDE;
 
     // binds texture unit in GL
     void setTextureUnit(int unitIdx);