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

ppapi/proxy/ppb_video_decoder_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_VIDEO_DECODER_PROXY_H_
 #define PPAPI_PROXY_PPB_VIDEO_DECODER_PROXY_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/shared_impl/video_decoder_impl.h"
 #include "ppapi/thunk/ppb_video_decoder_api.h"
 
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 class PPB_VideoDecoder_Proxy : public InterfaceProxy {
  public:
   PPB_VideoDecoder_Proxy(Dispatcher* dispatcher, const void* target_interface);
   virtual ~PPB_VideoDecoder_Proxy();
 
   static const Info* GetInfo();
 
   // Creates a VideoDecoder object in the plugin process.
@@ skipping 36 matching lines @@
   void SendMsgResetACKToPlugin(
       int32_t result, const ppapi::HostResource& decoder);
 
   // Message handlers in the plugin process to receive messages from the
   // renderer process.
   void OnMsgEndOfBitstreamACK(const ppapi::HostResource& decoder,
                               int32_t id, int32_t result);
   void OnMsgFlushACK(const ppapi::HostResource& decoder, int32_t result);
   void OnMsgResetACK(const ppapi::HostResource& decoder, int32_t result);
 
-  CompletionCallbackFactory<PPB_VideoDecoder_Proxy,
-                            ProxyNonThreadSafeRefCount> callback_factory_;
+  pp::CompletionCallbackFactory<PPB_VideoDecoder_Proxy,
+                                ProxyNonThreadSafeRefCount> callback_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_VideoDecoder_Proxy);
 };
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PPB_VIDEO_DECODER_PROXY_H_