cc: Remove unused metrics from RenderingStats.

cc/trees/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 "cc/trees/thread_proxy.h"
 
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 847 matching lines @@
   {
     TRACE_EVENT0("cc", "ThreadProxy::BeginFrameOnMainThread::commit");
 
     DebugScopedSetMainThreadBlocked main_thread_blocked(this);
 
     // This CapturePostTasks should be destroyed before CommitComplete() is
     // called since that goes out to the embedder, and we want the embedder
     // to receive its callbacks before that.
     BlockingTaskRunner::CapturePostTasks blocked;
 
-    RenderingStatsInstrumentation* stats_instrumentation =
-        layer_tree_host_->rendering_stats_instrumentation();
-    base::TimeTicks start_time = stats_instrumentation->StartRecording();
-
     CompletionEvent completion;
     Proxy::ImplThreadTaskRunner()->PostTask(
         FROM_HERE,
         base::Bind(&ThreadProxy::StartCommitOnImplThread,
                    impl_thread_weak_ptr_,
                    &completion,
                    queue.release(),
                    offscreen_context_provider));
     completion.Wait();
 
-    base::TimeDelta duration = stats_instrumentation->EndRecording(start_time);
-    stats_instrumentation->AddCommit(duration);
+    RenderingStatsInstrumentation* stats_instrumentation =
+        layer_tree_host_->rendering_stats_instrumentation();
     stats_instrumentation->IssueTraceEventForMainThreadStats();
     stats_instrumentation->AccumulateAndClearMainThreadStats();
   }
 
   layer_tree_host_->CommitComplete();
   layer_tree_host_->DidBeginFrame();
 }
 
 void ThreadProxy::StartCommitOnImplThread(
     CompletionEvent* completion,
@@ skipping 687 matching lines @@
     completion_event_for_commit_held_on_tree_activation_ = NULL;
   }
 
   UpdateBackgroundAnimateTicking();
 
   commit_to_activate_duration_history_.InsertSample(
       base::TimeTicks::HighResNow() - commit_complete_time_);
 }
 
 }  // namespace cc