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

ppapi/proxy/plugin_resource.h

 // 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.
 
 #ifndef PPAPI_PROXY_PLUGIN_RESOURCE_H_
 #define PPAPI_PROXY_PLUGIN_RESOURCE_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 16 matching lines @@
 class PluginDispatcher;
 
 class PPAPI_PROXY_EXPORT PluginResource : public Resource {
  public:
   enum Destination {
     RENDERER = 0,
     BROWSER = 1
   };
 
   PluginResource(Connection connection, PP_Instance instance);
-  virtual ~PluginResource();
+  ~PluginResource() override;
 
   // Returns true if we've previously sent a create message to the browser
   // or renderer. Generally resources will use these to tell if they should
   // lazily send create messages.
   bool sent_create_to_browser() const { return sent_create_to_browser_; }
   bool sent_create_to_renderer() const { return sent_create_to_renderer_; }
 
   // This handles a reply to a resource call. It works by looking up the
   // callback that was registered when CallBrowser/CallRenderer was called
   // and calling it with |params| and |msg|.
-  virtual void OnReplyReceived(const proxy::ResourceMessageReplyParams& params,
-                               const IPC::Message& msg) override;
+  void OnReplyReceived(const proxy::ResourceMessageReplyParams& params,
+                       const IPC::Message& msg) override;
 
   // Resource overrides.
   // Note: Subclasses shouldn't override these methods directly. Instead, they
   // should implement LastPluginRefWasDeleted() or InstanceWasDeleted() to get
   // notified.
-  virtual void NotifyLastPluginRefWasDeleted() override;
-  virtual void NotifyInstanceWasDeleted() override;
-
+  void NotifyLastPluginRefWasDeleted() override;
+  void NotifyInstanceWasDeleted() override;
 
   // Sends a create message to the browser or renderer for the current resource.
   void SendCreate(Destination dest, const IPC::Message& msg);
 
   // When the host returnes a resource to the plugin, it will create a pending
   // ResourceHost and send an ID back to the plugin that identifies the pending
   // object. The plugin uses this function to connect the plugin resource with
   // the pending host resource. See also PpapiHostMsg_AttachToPendingHost. This
   // is in lieu of sending a create message.
   void AttachToPendingHost(Destination dest, int pending_host_id);
@@ skipping 211 matching lines @@
 
   if (UnpackMessage<ReplyMsgClass>(reply, a, b, c, d, e))
     return result;
   return PP_ERROR_FAILED;
 }
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PLUGIN_RESOURCE_H_