dbus: Fix clang warnings about missing virtual and OVERRIDE annotations.

dbus/bus.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.
 //
 // TODO(satorux):
 // - Handle "disconnected" signal.
 
 #include "dbus/bus.h"
 
 #include "base/bind.h"
@@ skipping 15 matching lines @@
 
 // The class is used for watching the file descriptor used for D-Bus
 // communication.
 class Watch : public base::MessagePumpLibevent::Watcher {
  public:
   Watch(DBusWatch* watch)
       : raw_watch_(watch) {
     dbus_watch_set_data(raw_watch_, this, NULL);
   }
 
-  ~Watch() {
+  virtual ~Watch() {
     dbus_watch_set_data(raw_watch_, NULL, NULL);
   }
 
   // Returns true if the underlying file descriptor is ready to be watched.
   bool IsReadyToBeWatched() {
     return dbus_watch_get_enabled(raw_watch_);
   }
 
   // Starts watching the underlying file descriptor.
   void StartWatching() {
@@ skipping 20 matching lines @@
     CHECK(success) << "Unable to allocate memory";
   }
 
   // Stops watching the underlying file descriptor.
   void StopWatching() {
     file_descriptor_watcher_.StopWatchingFileDescriptor();
   }
 
  private:
   // Implement MessagePumpLibevent::Watcher.
-  virtual void OnFileCanReadWithoutBlocking(int file_descriptor) {
+  virtual void OnFileCanReadWithoutBlocking(int file_descriptor) OVERRIDE {
     const bool success = dbus_watch_handle(raw_watch_, DBUS_WATCH_READABLE);
     CHECK(success) << "Unable to allocate memory";
   }
 
   // Implement MessagePumpLibevent::Watcher.
-  virtual void OnFileCanWriteWithoutBlocking(int file_descriptor) {
+  virtual void OnFileCanWriteWithoutBlocking(int file_descriptor) OVERRIDE {
     const bool success = dbus_watch_handle(raw_watch_, DBUS_WATCH_WRITABLE);
     CHECK(success) << "Unable to allocate memory";
   }
 
   DBusWatch* raw_watch_;
   base::MessagePumpLibevent::FileDescriptorWatcher file_descriptor_watcher_;
 };
 
 // The class is used for monitoring the timeout used for D-Bus method
 // calls.
@@ skipping 736 matching lines @@
 }
 
 void Bus::OnDispatchStatusChangedThunk(DBusConnection* connection,
                                        DBusDispatchStatus status,
                                        void* data) {
   Bus* self = static_cast<Bus*>(data);
   self->OnDispatchStatusChanged(connection, status);
 }
 
 }  // namespace dbus