Update {virtual,override} to follow C++11 style in ppapi.

ppapi/proxy/ppb_flash_message_loop_proxy.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 "ppapi/proxy/ppb_flash_message_loop_proxy.h"
 
 #include "base/bind.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/private/ppb_flash_message_loop.h"
 #include "ppapi/proxy/enter_proxy.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_flash_message_loop_api.h"
 #include "ppapi/thunk/resource_creation_api.h"
 
 using ppapi::thunk::PPB_Flash_MessageLoop_API;
 
 namespace ppapi {
 namespace proxy {
 namespace {
 
 class FlashMessageLoop : public PPB_Flash_MessageLoop_API, public Resource {
  public:
   explicit FlashMessageLoop(const HostResource& resource);
-  virtual ~FlashMessageLoop();
+  ~FlashMessageLoop() override;
 
   // Resource overrides.
-  virtual PPB_Flash_MessageLoop_API* AsPPB_Flash_MessageLoop_API() override;
+  PPB_Flash_MessageLoop_API* AsPPB_Flash_MessageLoop_API() override;
 
   // PPB_Flash_MesssageLoop_API implementation.
-  virtual int32_t Run() override;
-  virtual void Quit() override;
-  virtual void RunFromHostProxy(
-      const RunFromHostProxyCallback& callback) override;
+  int32_t Run() override;
+  void Quit() override;
+  void RunFromHostProxy(const RunFromHostProxyCallback& callback) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlashMessageLoop);
 };
 
 FlashMessageLoop::FlashMessageLoop(const HostResource& resource)
     : Resource(OBJECT_IS_PROXY, resource) {
 }
 
 FlashMessageLoop::~FlashMessageLoop() {
@@ skipping 109 matching lines @@
 void PPB_Flash_MessageLoop_Proxy::WillQuitSoon(
     scoped_ptr<IPC::Message> reply_message,
     int32_t result) {
   PpapiHostMsg_PPBFlashMessageLoop_Run::WriteReplyParams(reply_message.get(),
                                                          result);
   Send(reply_message.release());
 }
 
 }  // namespace proxy
 }  // namespace ppapi