replace OVERRIDE and FINAL with override and final in chrome/browser/extensions/

chrome/browser/extensions/api/system_memory/system_memory_apitest.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 "base/message_loop/message_loop.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "extensions/browser/api/system_memory/memory_info_provider.h"
 
 namespace extensions {
 
 using core_api::system_memory::MemoryInfo;
 
 class MockMemoryInfoProviderImpl : public MemoryInfoProvider {
  public:
   MockMemoryInfoProviderImpl() {}
 
-  virtual bool QueryInfo() OVERRIDE {
+  virtual bool QueryInfo() override {
     info_.capacity = 4096;
     info_.available_capacity = 1024;
     return true;
   }
  private:
   virtual ~MockMemoryInfoProviderImpl() {}
 };
 
 class SystemMemoryApiTest: public ExtensionApiTest {
  public:
   SystemMemoryApiTest() {}
   virtual ~SystemMemoryApiTest() {}
 
-  virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
+  virtual void SetUpInProcessBrowserTestFixture() override {
     ExtensionApiTest::SetUpInProcessBrowserTestFixture();
     message_loop_.reset(new base::MessageLoopForUI);
   }
 
  private:
   scoped_ptr<base::MessageLoop> message_loop_;
 };
 
 IN_PROC_BROWSER_TEST_F(SystemMemoryApiTest, Memory) {
   scoped_refptr<MemoryInfoProvider> provider = new MockMemoryInfoProviderImpl();
   // The provider is owned by the single MemoryInfoProvider instance.
   MemoryInfoProvider::InitializeForTesting(provider);
   ASSERT_TRUE(RunExtensionTest("system/memory")) << message_;
 }
 
 }  // namespace extensions