Converted PluginResource reply message handling to use base::Callback

ppapi/proxy/printing_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_PRINTING_RESOURCE_H_
 #define PPAPI_PROXY_PRINTING_RESOURCE_H_
 
 #include "ppapi/proxy/connection.h"
 #include "ppapi/proxy/plugin_resource.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
@@ skipping 13 matching lines @@
 
   // Resource overrides.
   virtual thunk::PPB_Printing_API* AsPPB_Printing_API() OVERRIDE;
 
   // PPB_Printing_API.
   virtual int32_t GetDefaultPrintSettings(
       PP_PrintSettings_Dev* print_settings,
       scoped_refptr<TrackedCallback> callback) OVERRIDE;
 
  private:
-  // PluginResource override.
-  virtual void OnReplyReceived(const ResourceMessageReplyParams& params,
-                               const IPC::Message& msg) OVERRIDE;
-
   void OnPluginMsgGetDefaultPrintSettingsReply(
+      PP_PrintSettings_Dev* settings_out,
+      scoped_refptr<TrackedCallback> callback,
       const ResourceMessageReplyParams& params,
-      const PP_PrintSettings_Dev& print_settings);
-
-  PP_PrintSettings_Dev* print_settings_;
-
-  scoped_refptr<TrackedCallback> callback_;
+      const PP_PrintSettings_Dev& settings);
 
   DISALLOW_COPY_AND_ASSIGN(PrintingResource);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PRINTING_RESOURCE_H_