Refactor some ResourceMessageReply usages.

content/renderer/pepper/pepper_device_enumeration_host_helper.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 CONTENT_RENDERER_PEPPER_PEPPER_DEVICE_ENUMERATION_HOST_HELPER_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_DEVICE_ENUMERATION_HOST_HELPER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/content_export.h"
 #include "ppapi/c/dev/ppb_device_ref_dev.h"
+#include "ppapi/host/host_message_context.h"
 #include "url/gurl.h"
 
 namespace ppapi {
 struct DeviceRefData;
 
 namespace host {
-struct HostMessageContext;
-struct ReplyMessageContext;
 class ResourceHost;
 }
-}
+
+}  // namespace ppapi
 
 namespace IPC {
 class Message;
 }
 
 namespace content {
 
 // Resource hosts that support device enumeration can use this class to filter
 // and process PpapiHostMsg_DeviceEnumeration_* messages.
 // TODO(yzshen): Refactor ppapi::host::ResourceMessageFilter to support message
@@ skipping 58 matching lines @@
   // Non-owning pointers.
   ppapi::host::ResourceHost* resource_host_;
   Delegate* delegate_;
 
   PP_DeviceType_Dev device_type_;
   GURL document_url_;
 
   scoped_ptr<ScopedRequest> enumerate_;
   scoped_ptr<ScopedRequest> monitor_;
 
-  scoped_ptr<ppapi::host::ReplyMessageContext> enumerate_devices_context_;
+  ppapi::host::ReplyMessageContext enumerate_devices_context_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperDeviceEnumerationHostHelper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_DEVICE_ENUMERATION_HOST_HELPER_H_