ozone: Fix chromium-style warnings in rendering_helper.cc

content/common/gpu/media/rendering_helper.cc

 // Copyright 2013 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 "content/common/gpu/media/rendering_helper.h"
 
 #include <algorithm>
 #include <numeric>
 #include <vector>
 
@@ skipping 84 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(DisplayConfiguratorObserver);
 };
 
 class RenderingHelper::StubOzoneDelegate : public ui::PlatformWindowDelegate {
  public:
   StubOzoneDelegate() : accelerated_widget_(gfx::kNullAcceleratedWidget) {
     ui_thread_gpu_.Initialize();
     platform_window_ = ui::OzonePlatform::GetInstance()->CreatePlatformWindow(
         this, gfx::Rect());
   }
-  virtual ~StubOzoneDelegate() {}
+  ~StubOzoneDelegate() override {}
 
   void OnBoundsChanged(const gfx::Rect& new_bounds) override {}
 
   void OnDamageRect(const gfx::Rect& damaged_region) override {}
 
   void DispatchEvent(ui::Event* event) override {}
 
   void OnCloseRequest() override {}
   void OnClosed() override {}
 
@@ skipping 717 matching lines @@
   // When the rendering falls behind, drops frames.
   while (scheduled_render_time_ < target) {
     scheduled_render_time_ += frame_duration_;
     DropOneFrameForAllVideos();
   }
 
   message_loop_->PostDelayedTask(
       FROM_HERE, render_task_.callback(), target - now);
 }
 }  // namespace content