Add virtual and OVERRIDE to base/ implementation files

base/message_loop_proxy_impl_unittest.cc

 // Copyright (c) 2012 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_proxy_impl.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
@@ skipping 19 matching lines @@
               base::MessageLoopProxy::current());
   }
 
   void AssertOnFileThread() const {
     ASSERT_TRUE(file_thread_->message_loop_proxy()->BelongsToCurrentThread());
     ASSERT_EQ(file_thread_->message_loop_proxy(),
               base::MessageLoopProxy::current());
   }
 
  protected:
-  virtual void SetUp() {
+  virtual void SetUp() OVERRIDE {
     io_thread_.reset(new base::Thread("MessageLoopProxyImplTest_IO"));
     file_thread_.reset(new base::Thread("MessageLoopProxyImplTest_File"));
     io_thread_->Start();
     file_thread_->Start();
   }
 
-  virtual void TearDown() {
+  virtual void TearDown() OVERRIDE {
     io_thread_->Stop();
     file_thread_->Stop();
   }
 
   static void BasicFunction(MessageLoopProxyImplTest* test) {
     test->AssertOnFileThread();
     test->Quit();
   }
 
   static void AssertNotRun() {
@@ skipping 59 matching lines @@
     scoped_ptr<base::Thread> test_thread(
         new base::Thread("MessageLoopProxyImplTest_Dummy"));
     test_thread->Start();
     message_loop_proxy = test_thread->message_loop_proxy();
   }
   bool ret = message_loop_proxy->PostTask(
       FROM_HERE,
       base::Bind(&MessageLoopProxyImplTest::AssertNotRun));
   EXPECT_FALSE(ret);
 }