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

cc/single_thread_proxy.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/single_thread_proxy.h"
 
+#include "cc/rendering_stats_subscriber.h"
+#include <wtf/CurrentTime.h>
+
+using namespace WTF;
 #include "base/debug/trace_event.h"
 #include "cc/draw_quad.h"
 #include "cc/graphics_context.h"
 #include "cc/layer_tree_host.h"
 #include "cc/resource_update_controller.h"
 
 namespace cc {
 
 scoped_ptr<Proxy> SingleThreadProxy::create(LayerTreeHost* layerTreeHost)
 {
@@ skipping 128 matching lines @@
     return initialized;
 }
 
 void SingleThreadProxy::renderingStats(RenderingStats* stats)
 {
     stats->totalCommitTimeInSeconds = m_totalCommitTime.InSecondsF();
     stats->totalCommitCount = m_totalCommitCount;
     m_layerTreeHostImpl->renderingStats(stats);
 }
 
+void SingleThreadProxy::startRecordingRenderingStats()
+{
+    // This subscriber will collect total commit time and total commit count.
+    m_renderingStatsSubscriber = RenderingStatsSubscriber::create();
+    m_layerTreeHostImpl->startRecordingRenderingStats();
+}
+
+void SingleThreadProxy::stopRecordingRenderingStats(RenderingStats* stats)
+{
+    // TODO(vollick): populate stats based on the subscriber here.
+    m_renderingStatsSubscriber.reset();
+    m_layerTreeHostImpl->stopRecordingRenderingStats(stats);
+}
+
 const RendererCapabilities& SingleThreadProxy::rendererCapabilities() const
 {
     DCHECK(m_rendererInitialized);
     // Note: this gets called during the commit by the "impl" thread
     return m_RendererCapabilitiesForMainThread;
 }
 
 void SingleThreadProxy::loseContext()
 {
     DCHECK(Proxy::isMainThread());
@@ skipping 224 matching lines @@
 
 void SingleThreadProxy::didSwapFrame()
 {
     if (m_nextFrameIsNewlyCommittedFrame) {
         m_nextFrameIsNewlyCommittedFrame = false;
         m_layerTreeHost->didCommitAndDrawFrame();
     }
 }
 
 }