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

ppapi/host/resource_host.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_HOST_RESOURCE_HOST_H_
 #define PPAPI_HOST_RESOURCE_HOST_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 13 matching lines @@
 struct HostMessageContext;
 class PpapiHost;
 class ResourceMessageFilter;
 
 // Some (but not all) resources have a corresponding object in the host side
 // that is kept alive as long as the resource in the plugin is alive. This is
 // the base class for such objects.
 class PPAPI_HOST_EXPORT ResourceHost : public ResourceMessageHandler {
  public:
   ResourceHost(PpapiHost* host, PP_Instance instance, PP_Resource resource);
-  virtual ~ResourceHost();
+  ~ResourceHost() override;
 
   PpapiHost* host() { return host_; }
   PP_Instance pp_instance() const { return pp_instance_; }
   PP_Resource pp_resource() const { return pp_resource_; }
 
   // This runs any message filters in |message_filters_|. If the message is not
   // handled by these filters then the host's own message handler is run. True
   // is always returned (the message will always be handled in some way).
-  virtual bool HandleMessage(const IPC::Message& msg,
-                             HostMessageContext* context) override;
+  bool HandleMessage(const IPC::Message& msg,
+                     HostMessageContext* context) override;
 
   // Sets the PP_Resource ID when the plugin attaches to a pending resource
   // host. This will notify subclasses by calling
   // DidConnectPendingHostToResource.
   //
   // The current PP_Resource for all pending hosts should be 0. See
   // PpapiHostMsg_AttachToPendingHost.
   void SetPPResourceForPendingHost(PP_Resource pp_resource);
 
-  virtual void SendReply(const ReplyMessageContext& context,
-                         const IPC::Message& msg) override;
+  void SendReply(const ReplyMessageContext& context,
+                 const IPC::Message& msg) override;
 
   // Simple RTTI. A subclass that is a host for one of these APIs will override
   // the appropriate function and return true.
   virtual bool IsCompositorHost();
   virtual bool IsFileRefHost();
   virtual bool IsFileSystemHost();
   virtual bool IsGraphics2DHost();
   virtual bool IsMediaStreamVideoTrackHost();
 
  protected:
@@ skipping 21 matching lines @@
   // messages to.
   std::vector<scoped_refptr<ResourceMessageFilter> > message_filters_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceHost);
 };
 
 }  // namespace host
 }  // namespace ppapi
 
 #endif  // PPAPI_HOST_RESOURCE_HOST_H_