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

ppapi/proxy/ppb_file_chooser_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_CHOOSER_PROXY_H_
 #define PPAPI_PROXY_PPB_FILE_CHOOSER_PROXY_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/proxy/interface_proxy.h"
 #include "ppapi/proxy/proxy_non_thread_safe_ref_count.h"
 #include "ppapi/thunk/ppb_file_chooser_api.h"
 
 struct PPB_FileChooser_Dev;
 
 namespace ppapi {
+
 class HostResource;
-}
 
-namespace pp {
 namespace proxy {
 
 struct PPBFileRef_CreateInfo;
 
 class PPB_FileChooser_Proxy : public InterfaceProxy {
  public:
   PPB_FileChooser_Proxy(Dispatcher* dispatcher, const void* target_interface);
   virtual ~PPB_FileChooser_Proxy();
 
   static const Info* GetInfo();
@@ skipping 20 matching lines @@
   // Host -> plugin message handlers.
   void OnMsgChooseComplete(
       const ppapi::HostResource& chooser,
       int32_t result_code,
       const std::vector<PPBFileRef_CreateInfo>& chosen_files);
 
   // Called when the show is complete in the host. This will notify the plugin
   // via IPC and OnMsgChooseComplete will be called there.
   void OnShowCallback(int32_t result, const ppapi::HostResource& chooser);
 
-  CompletionCallbackFactory<PPB_FileChooser_Proxy,
-                            ProxyNonThreadSafeRefCount> callback_factory_;
+  pp::CompletionCallbackFactory<PPB_FileChooser_Proxy,
+                                ProxyNonThreadSafeRefCount> callback_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_FileChooser_Proxy);
 };
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PPB_FILE_CHOOSER_PROXY_H_