Add virtual and OVERRIDE to base/ implementation files

base/message_loop_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 <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/eintr_wrapper.h"
@@ skipping 1528 matching lines @@
 }
 
 #endif  // defined(OS_WIN)
 
 #if defined(OS_POSIX) && !defined(OS_NACL)
 
 namespace {
 
 class QuitDelegate : public MessageLoopForIO::Watcher {
  public:
-  virtual void OnFileCanWriteWithoutBlocking(int fd) {
+  virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE {
     MessageLoop::current()->Quit();
   }
-  virtual void OnFileCanReadWithoutBlocking(int fd) {
+  virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE {
     MessageLoop::current()->Quit();
   }
 };
 
 TEST(MessageLoopTest, FileDescriptorWatcherOutlivesMessageLoop) {
   // Simulate a MessageLoop that dies before an FileDescriptorWatcher.
   // This could happen when people use the Singleton pattern or atexit.
 
   // Create a file descriptor.  Doesn't need to be readable or writable,
   // as we don't need to actually get any notifications.
@@ skipping 74 matching lines @@
   bool* destruction_observer_called_;
 };
 
 class MLDestructionObserver : public MessageLoop::DestructionObserver {
  public:
   MLDestructionObserver(bool* task_destroyed, bool* destruction_observer_called)
       : task_destroyed_(task_destroyed),
         destruction_observer_called_(destruction_observer_called),
         task_destroyed_before_message_loop_(false) {
   }
-  virtual void WillDestroyCurrentMessageLoop() {
+  virtual void WillDestroyCurrentMessageLoop() OVERRIDE {
     task_destroyed_before_message_loop_ = *task_destroyed_;
     *destruction_observer_called_ = true;
   }
   bool task_destroyed_before_message_loop() const {
     return task_destroyed_before_message_loop_;
   }
  private:
   bool* task_destroyed_;
   bool* destruction_observer_called_;
   bool task_destroyed_before_message_loop_;
@@ skipping 17 matching lines @@
       base::Bind(&DestructionObserverProbe::Run,
                  new DestructionObserverProbe(&task_destroyed,
                                               &destruction_observer_called)),
       kDelay);
   delete loop;
   EXPECT_TRUE(observer.task_destroyed_before_message_loop());
   // The task should have been destroyed when we deleted the loop.
   EXPECT_TRUE(task_destroyed);
   EXPECT_TRUE(destruction_observer_called);
 }