Use container::back() and container::pop_back().

cc/surfaces/display.cc

 // Copyright 2014 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/surfaces/display.h"
 
 #include <stddef.h>
 
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 391 matching lines @@
     aggregator_->SetFullDamageForSurface(current_surface_id_);
 }
 
 void Display::OnSurfaceDamaged(SurfaceId surface_id, bool* changed) {
   if (aggregator_ &&
       aggregator_->previous_contained_surfaces().count(surface_id)) {
     Surface* surface = surface_manager_->GetSurfaceForId(surface_id);
     if (surface) {
       const CompositorFrame& current_frame = surface->GetEligibleFrame();
       if (!current_frame.delegated_frame_data ||
-          !current_frame.delegated_frame_data->resource_list.size()) {
+          current_frame.delegated_frame_data->resource_list.empty()) {
         aggregator_->ReleaseResources(surface_id);
       }
     }
     if (scheduler_)
       scheduler_->SurfaceDamaged(surface_id);
     *changed = true;
   } else if (surface_id == current_surface_id_) {
     if (scheduler_)
       scheduler_->SurfaceDamaged(surface_id);
     *changed = true;
   }
 
   if (surface_id == current_surface_id_)
     UpdateRootSurfaceResourcesLocked();
 }
 
 SurfaceId Display::CurrentSurfaceId() {
   return current_surface_id_;
 }
 
 }  // namespace cc