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

components/pdf/renderer/pepper_pdf_host.h

 // 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.
 
 #ifndef COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_
 #define COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 23 matching lines @@
 }
 }
 
 namespace pdf {
 
 class PepperPDFHost : public ppapi::host::ResourceHost {
  public:
   PepperPDFHost(content::RendererPpapiHost* host,
                 PP_Instance instance,
                 PP_Resource resource);
-  virtual ~PepperPDFHost();
+  ~PepperPDFHost() override;
 
-  virtual int32_t OnResourceMessageReceived(
+  int32_t OnResourceMessageReceived(
       const IPC::Message& msg,
       ppapi::host::HostMessageContext* context) override;
 
  private:
   int32_t OnHostMsgGetLocalizedString(ppapi::host::HostMessageContext* context,
                                       PP_ResourceString string_id);
   int32_t OnHostMsgDidStartLoading(ppapi::host::HostMessageContext* context);
   int32_t OnHostMsgDidStopLoading(ppapi::host::HostMessageContext* context);
   int32_t OnHostMsgSetContentRestriction(
       ppapi::host::HostMessageContext* context,
@@ skipping 23 matching lines @@
                        uint32_t* out_byte_count);
 
   content::RendererPpapiHost* host_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperPDFHost);
 };
 
 }  // namespace pdf
 
 #endif  // COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_