Add the "virtual" keyword on method overrides that are missing it.

webkit/glue/plugins/pepper_url_request_info.h

 // Copyright (c) 2010 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 WEBKIT_GLUE_PLUGINS_PEPPER_URL_REQUEST_INFO_H_
 #define WEBKIT_GLUE_PLUGINS_PEPPER_URL_REQUEST_INFO_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 12 matching lines @@
 class URLRequestInfo : public Resource {
  public:
   explicit URLRequestInfo(PluginModule* module);
   virtual ~URLRequestInfo();
 
   // Returns a pointer to the interface implementing PPB_URLRequestInfo that is
   // exposed to the plugin.
   static const PPB_URLRequestInfo* GetInterface();
 
   // Resource overrides.
-  URLRequestInfo* AsURLRequestInfo() { return this; }
+  virtual URLRequestInfo* AsURLRequestInfo();
 
   // PPB_URLRequestInfo implementation.
   bool SetBooleanProperty(PP_URLRequestProperty property, bool value);
   bool SetStringProperty(PP_URLRequestProperty property,
                          const std::string& value);
   bool AppendDataToBody(const std::string& data);
   bool AppendFileToBody(FileRef* file_ref,
                         int64_t start_offset,
                         int64_t number_of_bytes,
                         PP_Time expected_last_modified_time);
@@ skipping 16 matching lines @@
 
   bool stream_to_file_;
   bool follow_redirects_;
   bool record_download_progress_;
   bool record_upload_progress_;
 };
 
 }  // namespace pepper
 
 #endif  // WEBKIT_GLUE_PLUGINS_PEPPER_URL_REQUEST_INFO_H_