cc: Add back a benchmark category trace for counting renderer frames

cc/trees/layer_tree_host_impl.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/layer_tree_host_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1570 matching lines @@
   metadata.root_scroll_offset =
       gfx::ScrollOffsetToVector2dF(active_tree_->TotalScrollOffset());
 
   return metadata;
 }
 
 bool LayerTreeHostImpl::DrawLayers(FrameData* frame) {
   DCHECK(CanDraw());
   DCHECK_EQ(frame->has_no_damage, frame->render_passes.empty());
 
-  TRACE_EVENT0("cc", "LayerTreeHostImpl::DrawLayers");
+  TRACE_EVENT0("cc,benchmark", "LayerTreeHostImpl::DrawLayers");
 
   ResetRequiresHighResToDraw();
 
   if (frame->has_no_damage) {
     DCHECK(!resourceless_software_draw_);
 
     TRACE_EVENT_INSTANT0("cc", "EarlyOut_NoDamage", TRACE_EVENT_SCOPE_THREAD);
     active_tree()->BreakSwapPromises(SwapPromise::SWAP_FAILS);
     return false;
   }
@@ skipping 2500 matching lines @@
   if (is_visible) {
     worker_context_visibility_ =
         worker_context->CacheController()->ClientBecameVisible();
   } else {
     worker_context->CacheController()->ClientBecameNotVisible(
         std::move(worker_context_visibility_));
   }
 }
 
 }  // namespace cc