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

ppapi/proxy/ppb_broker_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_broker_proxy.h"
 
 #include "base/bind.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/trusted/ppb_broker_trusted.h"
 #include "ppapi/proxy/enter_proxy.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/platform_file.h"
 #include "ppapi/shared_impl/tracked_callback.h"
 #include "ppapi/thunk/ppb_broker_api.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/resource_creation_api.h"
 #include "ppapi/thunk/thunk.h"
 
 using ppapi::IntToPlatformFile;
 using ppapi::PlatformFileToInt;
 using ppapi::thunk::PPB_Broker_API;
 
 namespace ppapi {
 namespace proxy {
 
 class Broker : public PPB_Broker_API, public Resource {
  public:
   explicit Broker(const HostResource& resource);
-  virtual ~Broker();
+  ~Broker() override;
 
   // Resource overrides.
-  virtual PPB_Broker_API* AsPPB_Broker_API() override;
+  PPB_Broker_API* AsPPB_Broker_API() override;
 
   // PPB_Broker_API implementation.
-  virtual int32_t Connect(
-      scoped_refptr<TrackedCallback> connect_callback) override;
-  virtual int32_t GetHandle(int32_t* handle) override;
+  int32_t Connect(scoped_refptr<TrackedCallback> connect_callback) override;
+  int32_t GetHandle(int32_t* handle) override;
 
   // Called by the proxy when the host side has completed the request.
   void ConnectComplete(IPC::PlatformFileForTransit socket_handle,
                        int32_t result);
 
  private:
   bool called_connect_;
   scoped_refptr<TrackedCallback> current_connect_callback_;
 
   // The plugin module owns the handle.
@@ skipping 178 matching lines @@
       // The easiest way to clean it up is to just put it in an object
       // and then close it. This failure case is not performance critical.
       // The handle could still leak if Send succeeded but the IPC later failed.
       base::SyncSocket temp_socket(
           IPC::PlatformFileForTransitToPlatformFile(foreign_socket_handle));
   }
 }
 
 }  // namespace proxy
 }  // namespace ppapi