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

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index 5a62ea353a456b9092e0a27ce82c5965ad3a47a6..207f5344d7c9d6b4742dff118aa29007c619ef7e 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -8,6 +8,7 @@
 #include <list>
 #include <set>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
@@ -48,6 +49,7 @@ class LayerTreeImpl;
 class MemoryHistory;
 class PageScaleAnimation;
 class PaintTimeCounter;
+class PerformanceDrawTimingCounter;
 class PictureLayerImpl;
 class RasterWorkerPool;
 class RenderPassDrawQuad;
@@ -358,6 +360,9 @@ class CC_EXPORT LayerTreeHostImpl
   FrameRateCounter* fps_counter() {
     return fps_counter_.get();
   }
+  PerformanceDrawTimingCounter* draw_counter() {
+    return draw_counter_.get();
+  }
   PaintTimeCounter* paint_time_counter() {
     return paint_time_counter_.get();
   }
@@ -620,10 +625,13 @@ class CC_EXPORT LayerTreeHostImpl
   scoped_ptr<LayerTreeHostImplTimeSourceAdapter> time_source_client_adapter_;
 
   scoped_ptr<FrameRateCounter> fps_counter_;
+  scoped_ptr<PerformanceDrawTimingCounter> draw_counter_;
   scoped_ptr<PaintTimeCounter> paint_time_counter_;
   scoped_ptr<MemoryHistory> memory_history_;
   scoped_ptr<DebugRectHistory> debug_rect_history_;
 
+  std::vector <std::pair<int, int64_t> > uncommitted_draw_frame_ids_;
+
   scoped_ptr<TextureMailboxDeleter> texture_mailbox_deleter_;
 
   // The maximum memory that would be used by the prioritized resource