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

ppapi/proxy/ppp_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_PPP_VIDEO_DECODER_PROXY_H_
 #define PPAPI_PROXY_PPP_VIDEO_DECODER_PROXY_H_
 
 #include "ppapi/c/dev/ppp_video_decoder_dev.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/proxy/interface_proxy.h"
 #include "ppapi/shared_impl/host_resource.h"
 
 struct PP_Picture_Dev;
 struct PP_Size;
 
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 class PPP_VideoDecoder_Proxy : public InterfaceProxy {
  public:
   PPP_VideoDecoder_Proxy(Dispatcher* dispatcher, const void* target_interface);
   virtual ~PPP_VideoDecoder_Proxy();
 
   static const Info* GetInfo();
 
   const PPP_VideoDecoder_Dev* ppp_video_decoder_target() const {
@@ skipping 13 matching lines @@
   void OnMsgPictureReady(const ppapi::HostResource& decoder,
                          const PP_Picture_Dev& picture_buffer);
   void OnMsgNotifyEndOfStream(const ppapi::HostResource& decoder);
   void OnMsgNotifyError(const ppapi::HostResource& decoder,
                         PP_VideoDecodeError_Dev error);
 
   DISALLOW_COPY_AND_ASSIGN(PPP_VideoDecoder_Proxy);
 };
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PPP_VIDEO_DECODER_PROXY_H_