Standardize usage of virtual/override/final in cc/

cc/test/test_shared_bitmap_manager.h

 // 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.
 
 #ifndef CC_TEST_TEST_SHARED_BITMAP_MANAGER_H_
 #define CC_TEST_TEST_SHARED_BITMAP_MANAGER_H_
 
 #include <map>
 
 #include "base/synchronization/lock.h"
 #include "cc/resources/shared_bitmap_manager.h"
 
 namespace cc {
 
 class TestSharedBitmapManager : public SharedBitmapManager {
  public:
   TestSharedBitmapManager();
-  virtual ~TestSharedBitmapManager();
+  ~TestSharedBitmapManager() override;
 
-  virtual scoped_ptr<SharedBitmap> AllocateSharedBitmap(const gfx::Size& size)
-      override;
+  scoped_ptr<SharedBitmap> AllocateSharedBitmap(const gfx::Size& size) override;
 
-  virtual scoped_ptr<SharedBitmap> GetSharedBitmapFromId(
+  scoped_ptr<SharedBitmap> GetSharedBitmapFromId(
       const gfx::Size&,
       const SharedBitmapId& id) override;
 
-  virtual scoped_ptr<SharedBitmap> GetBitmapForSharedMemory(
+  scoped_ptr<SharedBitmap> GetBitmapForSharedMemory(
       base::SharedMemory* memory) override;
 
  private:
   base::Lock lock_;
   std::map<SharedBitmapId, base::SharedMemory*> bitmap_map_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_TEST_SHARED_BITMAP_MANAGER_H_