Mojo: Convert the remaining OVERRIDEs to override in mojo/.

mojo/examples/pepper_container_app/pepper_container_app.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/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "build/build_config.h"
@@ skipping 36 matching lines @@
     SizePtr size(Size::New());
     size->width = 800;
     size->height = 600;
     viewport_->Create(size.Pass(),
                       base::Bind(&PepperContainerApp::OnCreatedNativeViewport,
                                  weak_factory_.GetWeakPtr()));
     viewport_->Show();
   }
 
   // NativeViewportClient implementation.
-  virtual void OnDestroyed() OVERRIDE {
+  virtual void OnDestroyed() override {
     ppapi::ProxyAutoLock lock;
 
     if (plugin_instance_) {
       plugin_instance_->DidDestroy();
       plugin_instance_.reset();
     }
 
     base::MessageLoop::current()->Quit();
   }
 
-  virtual void OnSizeChanged(SizePtr size) OVERRIDE {
+  virtual void OnSizeChanged(SizePtr size) override {
     ppapi::ProxyAutoLock lock;
 
     if (plugin_instance_) {
       PP_Rect pp_rect = {{0, 0}, {size->width, size->height}};
       plugin_instance_->DidChangeView(pp_rect);
     }
   }
 
   virtual void OnEvent(EventPtr event,
-                       const mojo::Callback<void()>& callback) OVERRIDE {
+                       const mojo::Callback<void()>& callback) override {
     if (!event->location_data.is_null()) {
       ppapi::ProxyAutoLock lock;
 
       // TODO(yzshen): Handle events.
     }
     callback.Run();
   }
 
   // MojoPpapiGlobals::Delegate implementation.
-  virtual ScopedMessagePipeHandle CreateGLES2Context() OVERRIDE {
+  virtual ScopedMessagePipeHandle CreateGLES2Context() override {
     CommandBufferPtr command_buffer;
     SizePtr size = Size::New();
     size->width = 800;
     size->width = 600;
     // TODO(jamesr): Output a surface to the native viewport instead.
     gpu_service_->CreateOnscreenGLES2Context(
         native_viewport_id_, size.Pass(), Get(&command_buffer));
     return command_buffer.PassMessagePipe();
   }
 
@@ skipping 22 matching lines @@
 
 }  // namespace examples
 }  // namespace mojo
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunnerChromium runner(
       new mojo::examples::PepperContainerApp);
   return runner.Run(shell_handle);
 }