cc: Remove unused metrics from RenderingStats.

cc/resources/picture_pile_impl.h

Index: cc/resources/picture_pile_impl.h
diff --git a/cc/resources/picture_pile_impl.h b/cc/resources/picture_pile_impl.h
index c6c3ab3fbe4addf917d45888f98b1f1d9958a05c..ed50bec8b5836d6668f3d55e384576885383d788 100644
--- a/cc/resources/picture_pile_impl.h
+++ b/cc/resources/picture_pile_impl.h
@@ -11,6 +11,7 @@
 
 #include "base/time/time.h"
 #include "cc/base/cc_export.h"
+#include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/resources/picture_pile_base.h"
 #include "skia/ext/analysis_canvas.h"
 #include "skia/ext/refptr.h"
@@ -27,16 +28,6 @@ class CC_EXPORT PicturePileImpl : public PicturePileBase {
   // Get paint-safe version of this picture for a specific thread.
   PicturePileImpl* GetCloneForDrawingOnThread(unsigned thread_index) const;
 
-  struct CC_EXPORT RasterStats {
-    // Minimum rasterize time from N runs
-    // N=max(1,slow-down-raster-scale-factor)
-    base::TimeDelta best_rasterize_time;
-    // Total rasterize time for all N runs
-    base::TimeDelta total_rasterize_time;
-    // Total number of pixels rasterize in all N runs
-    int64 total_pixels_rasterized;
-  };
-
   // Raster a subrect of this PicturePileImpl into the given canvas.
   // It's only safe to call paint on a cloned version.  It is assumed
   // that contents_scale has already been applied to this canvas.
@@ -49,7 +40,7 @@ class CC_EXPORT PicturePileImpl : public PicturePileBase {
       SkCanvas* canvas,
       gfx::Rect canvas_rect,
       float contents_scale,
-      RasterStats* raster_stats);
+      RenderingStatsInstrumentation* rendering_stats_instrumentation);
 
   // Similar to the above RasterDirect method, but this is a convenience method
   // for when it is known that the raster is going to an intermediate bitmap
@@ -58,7 +49,7 @@ class CC_EXPORT PicturePileImpl : public PicturePileBase {
       SkCanvas* canvas,
       gfx::Rect canvas_rect,
       float contents_scale,
-      RasterStats* raster_stats);
+      RenderingStatsInstrumentation* stats_instrumentation);
 
   // Called when analyzing a tile. We can use AnalysisCanvas as
   // SkDrawPictureCallback, which allows us to early out from analysis.
@@ -137,7 +128,7 @@ class CC_EXPORT PicturePileImpl : public PicturePileBase {
       SkDrawPictureCallback* callback,
       gfx::Rect canvas_rect,
       float contents_scale,
-      RasterStats* raster_stats);
+      RenderingStatsInstrumentation* rendering_stats_instrumentation);
 
   // Once instantiated, |clones_for_drawing_| can't be modified.  This
   // guarantees thread-safe access during the life time of a PicturePileImpl