Adding hooks for gathering total pixels painted and rasterized stats.

cc/rendering_stats.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CCRenderingStats_h
 #define CCRenderingStats_h
 
 namespace cc {
 
 struct RenderingStats {
     // FIXME: Rename these to animationFrameCount and screenFrameCount, crbug.com/138641.
     int numAnimationFrames;
     int numFramesSentToScreen;
     int droppedFrameCount;
     double totalPaintTimeInSeconds;
     double totalRasterizeTimeInSeconds;
     double totalCommitTimeInSeconds;
     size_t totalCommitCount;
+    int64_t totalPixelsPainted;

[jamesr, 2012/10/29 23:38:49]

why is this int64_t instead of size_t?  Either use size_t to be consistent with
the rest of the struct or use int64 from base/basictypes.h to be consistent with
the rest of the chromium codebase

[hartmanng, 2012/10/30 20:10:51]

brianderson@ requested that I switch it to 64-bit values, presumably to ensure
we can handle very large numbers of pixels if we leave the benchmark running for
a long period of time.

I went ahead and switched all the size_t and int values here to int64 since I
believe brianderson@ plans to anyway.

+    int64_t totalPixelsRasterized;
     size_t numImplThreadScrolls;
     size_t numMainThreadScrolls;
 
-    RenderingStats()
-        : numAnimationFrames(0)
-        , numFramesSentToScreen(0)
-        , droppedFrameCount(0)
-        , totalPaintTimeInSeconds(0)
-        , totalRasterizeTimeInSeconds(0)
-        , totalCommitTimeInSeconds(0)
-        , totalCommitCount(0)
-        , numImplThreadScrolls(0)
-        , numMainThreadScrolls(0)
-    {
-    }
+    RenderingStats();
 };
 
 }
 
 #endif