Standardize usage of virtual/override/final specifiers in base/.

base/memory/discardable_memory_shmem_allocator.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 "base/memory/discardable_memory_shmem_allocator.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/discardable_shared_memory.h"
 
 namespace base {
 namespace {
 
 // Default allocator implementation that allocates in-process
 // DiscardableSharedMemory instances.
 class DiscardableMemoryShmemAllocatorImpl
     : public DiscardableMemoryShmemAllocator {
  public:
   // Overridden from DiscardableMemoryShmemAllocator:
-  virtual scoped_ptr<DiscardableSharedMemory>
-  AllocateLockedDiscardableSharedMemory(size_t size) override {
+  scoped_ptr<DiscardableSharedMemory> AllocateLockedDiscardableSharedMemory(
+      size_t size) override {
     scoped_ptr<DiscardableSharedMemory> memory(new DiscardableSharedMemory);
     if (!memory->CreateAndMap(size))
       return scoped_ptr<DiscardableSharedMemory>();
 
     return memory.Pass();
   }
 };
 
 LazyInstance<DiscardableMemoryShmemAllocatorImpl>::Leaky g_default_allocator =
     LAZY_INSTANCE_INITIALIZER;
@@ skipping 17 matching lines @@
 // static
 DiscardableMemoryShmemAllocator*
 DiscardableMemoryShmemAllocator::GetInstance() {
   if (!g_allocator)
     g_allocator = g_default_allocator.Pointer();
 
   return g_allocator;
 }
 
 }  // namespace base