replace 'virtual ... OVERRIDE' with '... override'

base/memory/discardable_memory_emulated.h

 // 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.
 
 #ifndef BASE_MEMORY_DISCARDABLE_MEMORY_EMULATED_H_
 #define BASE_MEMORY_DISCARDABLE_MEMORY_EMULATED_H_
 
 #include "base/memory/discardable_memory.h"
 
 #include "base/memory/discardable_memory_manager.h"
@@ skipping 13 matching lines @@
   // TODO(reveman): Remove this as it is breaking the discardable memory design
   // principle that implementations should not rely on information this is
   // unavailable in kernel space. crbug.com/400423
   BASE_EXPORT static void ReduceMemoryUsageUntilWithinLimit(size_t bytes);
 
   static void PurgeForTesting();
 
   bool Initialize();
 
   // Overridden from DiscardableMemory:
-  virtual DiscardableMemoryLockStatus Lock() OVERRIDE;
-  virtual void Unlock() OVERRIDE;
-  virtual void* Memory() const OVERRIDE;
+  DiscardableMemoryLockStatus Lock() override;
+  void Unlock() override;
+  void* Memory() const override;
 
   // Overridden from internal::DiscardableMemoryManagerAllocation:
-  virtual bool AllocateAndAcquireLock() OVERRIDE;
-  virtual void ReleaseLock() OVERRIDE {}
-  virtual void Purge() OVERRIDE;
+  bool AllocateAndAcquireLock() override;
+  void ReleaseLock() override {}
+  void Purge() override;
 
  private:
   const size_t bytes_;
   scoped_ptr<uint8[]> memory_;
   bool is_locked_;
 
   DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryEmulated);
 };
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_MEMORY_DISCARDABLE_MEMORY_EMULATED_H_