cc: Remove unused metrics from RenderingStats.

cc/trees/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 "cc/trees/single_thread_proxy.h"
 
 #include "base/auto_reset.h"
 #include "base/debug/trace_event.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/output_surface.h"
@@ skipping 173 matching lines @@
   // Commit immediately.
   {
     DebugScopedSetMainThreadBlocked main_thread_blocked(this);
     DebugScopedSetImplThread impl(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();
-
     layer_tree_host_impl_->BeginCommit();
 
     if (layer_tree_host_->contents_texture_manager()) {
       layer_tree_host_->contents_texture_manager()->
           PushTexturePrioritiesToBackings();
     }
     layer_tree_host_->BeginCommitOnImplThread(layer_tree_host_impl_.get());
 
     scoped_ptr<ResourceUpdateController> update_controller =
         ResourceUpdateController::Create(
@@ skipping 12 matching lines @@
 
 #ifndef NDEBUG
     // In the single-threaded case, the scale and scroll deltas should never be
     // touched on the impl layer tree.
     scoped_ptr<ScrollAndScaleSet> scroll_info =
         layer_tree_host_impl_->ProcessScrollDeltas();
     DCHECK(!scroll_info->scrolls.size());
     DCHECK_EQ(1.f, scroll_info->page_scale_delta);
 #endif
 
-    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();
   next_frame_is_newly_committed_frame_ = true;
 }
 
 void SingleThreadProxy::SetNeedsCommit() {
   DCHECK(Proxy::IsMainThread());
   layer_tree_host_->ScheduleComposite();
@@ skipping 287 matching lines @@
 void SingleThreadProxy::DidSwapFrame() {
   if (next_frame_is_newly_committed_frame_) {
     next_frame_is_newly_committed_frame_ = false;
     layer_tree_host_->DidCommitAndDrawFrame();
   }
 }
 
 bool SingleThreadProxy::CommitPendingForTesting() { return false; }
 
 }  // namespace cc