Add average commit time to perf tests.

cc/CCSingleThreadProxy.cpp

Index: cc/CCSingleThreadProxy.cpp
diff --git a/cc/CCSingleThreadProxy.cpp b/cc/CCSingleThreadProxy.cpp
index f6d4f67f1a9cb60c058611abbc39c5f57cc775e2..c857cc54d84cb5e559965b03bf96c05c41ba8325 100644
--- a/cc/CCSingleThreadProxy.cpp
+++ b/cc/CCSingleThreadProxy.cpp
@@ -28,6 +28,8 @@ CCSingleThreadProxy::CCSingleThreadProxy(CCLayerTreeHost* layerTreeHost)
     , m_contextLost(false)
     , m_rendererInitialized(false)
     , m_nextFrameIsNewlyCommittedFrame(false)
+    , m_totalCommitTime(0)

[nduca, 2012/09/15 00:36:09]

here and elsewhere, add unit. m_totalCommitTimeInSeconds

[brianderson, 2012/09/18 01:16:44]

Done.

+    , m_totalCommitCount(0)
 {
     TRACE_EVENT0("cc", "CCSingleThreadProxy::CCSingleThreadProxy");
     ASSERT(CCProxy::isMainThread());
@@ -150,8 +152,10 @@ bool CCSingleThreadProxy::recreateContext()
     return initialized;
 }
 
-void CCSingleThreadProxy::implSideRenderingStats(CCRenderingStats& stats)
+void CCSingleThreadProxy::renderingStats(CCRenderingStats& stats)
 {
+    stats.totalCommitTimeInSeconds = m_totalCommitTime;
+    stats.totalCommitCount = m_totalCommitCount;
     m_layerTreeHostImpl->renderingStats(stats);
 }
 
@@ -183,6 +187,7 @@ void CCSingleThreadProxy::doCommit(CCTextureUpdateQueue& queue)
         DebugScopedSetMainThreadBlocked mainThreadBlocked;
         DebugScopedSetImplThread impl;
 
+        double startTime = WTF::monotonicallyIncreasingTime();
         m_layerTreeHostImpl->beginCommit();
 
         m_layerTreeHost->beginCommitOnImplThread(m_layerTreeHostImpl.get());
@@ -205,6 +210,11 @@ void CCSingleThreadProxy::doCommit(CCTextureUpdateQueue& queue)
         OwnPtr<CCScrollAndScaleSet> scrollInfo = m_layerTreeHostImpl->processScrollDeltas();
         ASSERT(!scrollInfo->scrolls.size());
 #endif
+
+        double endTime = WTF::monotonicallyIncreasingTime();
+        double commitTime = endTime - startTime;
+        m_totalCommitTime += commitTime;
+        m_totalCommitCount++;
     }
     m_layerTreeHost->commitComplete();
     m_nextFrameIsNewlyCommittedFrame = true;