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

ppapi/proxy/ppp_video_decoder_proxy.cc

 // 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.
 
 #include "ppapi/proxy/ppp_video_decoder_proxy.h"
 
 #include "ppapi/proxy/host_dispatcher.h"
 #include "ppapi/proxy/plugin_resource_tracker.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/ppb_video_decoder_proxy.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_video_decoder_api.h"
 #include "ppapi/thunk/thunk.h"
 
-using ppapi::HostResource;
 using ppapi::thunk::PPB_VideoDecoder_API;
 
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 namespace {
 
 void ProvidePictureBuffers(PP_Instance instance, PP_Resource decoder,
                            uint32_t req_num_of_bufs, PP_Size dimensions) {
   HostResource decoder_resource;
   decoder_resource.SetHostResource(instance, decoder);
 
   HostDispatcher::GetForInstance(instance)->Send(
@@ skipping 131 matching lines @@
 
 void PPP_VideoDecoder_Proxy::OnMsgNotifyError(
     const HostResource& decoder, PP_VideoDecodeError_Dev error) {
   PP_Resource plugin_decoder = PluginResourceTracker::GetInstance()->
       PluginResourceForHostResource(decoder);
   ppp_video_decoder_target()->NotifyError(
       decoder.instance(), plugin_decoder, error);
 }
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi