Move RenderStats enumeration out of gpu_benchmarking_extension.

cc/rendering_stats.cc

 // 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.
 
 #include "cc/rendering_stats.h"
 
 namespace cc {
 
 RenderingStats::RenderingStats()
     : numAnimationFrames(0),
       numFramesSentToScreen(0),
       droppedFrameCount(0),
       totalPaintTimeInSeconds(0),
       totalRasterizeTimeInSeconds(0),
       totalCommitTimeInSeconds(0),
       totalCommitCount(0),
       totalPixelsPainted(0),
       totalPixelsRasterized(0),
       numImplThreadScrolls(0),
       numMainThreadScrolls(0),
       numLayersInLayerTree(0) {
 }
 
+void RenderingStats::enumerateFields(Enumerator* enumerator) const {
+    enumerator->addInt64("numAnimationFrames", numAnimationFrames);
+    enumerator->addInt64("numFramesSentToScreen", numFramesSentToScreen);
+    enumerator->addInt64("droppedFrameCount", droppedFrameCount);
+    enumerator->addDouble("totalPaintTimeInSeconds", totalPaintTimeInSeconds);
+    enumerator->addDouble("totalRasterizeTimeInSeconds",
+                          totalRasterizeTimeInSeconds);
+    enumerator->addDouble("totalCommitTimeInSeconds", totalCommitTimeInSeconds);
+    enumerator->addInt64("totalCommitCount", totalCommitCount);
+    enumerator->addInt64("totalPixelsPainted", totalPixelsPainted);
+    enumerator->addInt64("totalPixelsRasterized", totalPixelsRasterized);
+    enumerator->addInt64("numImplThreadScrolls", numImplThreadScrolls);
+    enumerator->addInt64("numMainThreadScrolls", numMainThreadScrolls);
+    enumerator->addInt64("numLayersInLayerTree", numLayersInLayerTree);
+}
+
 }  // namespace cc