Convert the pp::proxy namespace to the ppapi::proxy namespace.

ppapi/proxy/ppb_file_ref_proxy.h

 // Copyright (c) 2011 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_PPB_FILE_REF_PROXY_H_
 #define PPAPI_PROXY_PPB_FILE_REF_PROXY_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_time.h"
 #include "ppapi/proxy/interface_proxy.h"
 
 struct PPB_FileRef_Dev;
 
 namespace ppapi {
+
 class HostResource;
-}
 
-namespace pp {
 namespace proxy {
 
 struct PPBFileRef_CreateInfo;
 
 class PPB_FileRef_Proxy : public InterfaceProxy {
  public:
   PPB_FileRef_Proxy(Dispatcher* dispatcher, const void* target_interface);
   virtual ~PPB_FileRef_Proxy();
 
   static const Info* GetInfo();
@@ skipping 43 matching lines @@
   void OnMsgDelete(const ppapi::HostResource& host_resource,
                    uint32_t serialized_callback);
   void OnMsgRename(const ppapi::HostResource& file_ref,
                    const ppapi::HostResource& new_file_ref,
                    uint32_t serialized_callback);
 
   DISALLOW_COPY_AND_ASSIGN(PPB_FileRef_Proxy);
 };
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PPB_FILE_REF_PROXY_H_