NOT READY FOR REVIEW - switch to a subscriber model for rendering stats

cc/layer_tree_host.cc

 // Copyright 2011 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 "config.h"
 
+#include "cc/rendering_stats_subscriber.h"
 #include "cc/layer_tree_host.h"
 
 #include "Region.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop.h"
 #include "cc/font_atlas.h"
 #include "cc/graphics_context.h"
 #include "cc/heads_up_display_layer.h"
 #include "cc/heads_up_display_layer_impl.h"
 #include "cc/layer.h"
@@ skipping 736 matching lines @@
 
 void LayerTreeHost::stopRateLimiter(WebKit::WebGraphicsContext3D* context)
 {
     RateLimiterMap::iterator it = m_rateLimiters.find(context);
     if (it != m_rateLimiters.end()) {
         it->second->stop();
         m_rateLimiters.erase(it);
     }
 }
 
+void LayerTreeHost::startRecordingRenderingStats()
+{
+    m_renderingStatsSubscriber = RenderingStatsSubscriber::create();
+    m_proxy->startRecordingRenderingStats();
+}
+
+void LayerTreeHost::stopRecordingRenderingStats(RenderingStats* stats)
+{
+    // TODO(vollick): populate the stats here.
+    m_renderingStatsSubscriber.reset();
+    m_proxy->stopRecordingRenderingStats(stats);
+}
+
 void LayerTreeHost::rateLimit()
 {
     // Force a no-op command on the compositor context, so that any ratelimiting commands will wait for the compositing
     // context, and therefore for the SwapBuffers.
     m_proxy->forceSerializeOnSwapBuffers();
 }
 
 bool LayerTreeHost::bufferedUpdates()
 {
     return m_settings.maxPartialTextureUpdates != numeric_limits<size_t>::max();
@@ skipping 60 matching lines @@
             else
                 layer->notifyAnimationFinished(wallClockTime.ToDoubleT());
         }
     }
 
     for (size_t childIndex = 0; childIndex < layer->children().size(); ++childIndex)
         setAnimationEventsRecursive(events, layer->children()[childIndex].get(), wallClockTime);
 }
 
 } // namespace cc