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

ppapi/proxy/plugin_dispatcher_unittest.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 "base/memory/scoped_ptr.h"
 #include "ipc/ipc_message_utils.h"
 #include "ppapi/c/ppb_audio.h"
 #include "ppapi/c/ppp_instance.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/ppapi_proxy_test.h"
 
-using ppapi::HostResource;
-
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 namespace {
 
 bool received_create = false;
 
 // Implement PPB_Audio since it's a relatively simple PPB interface and
 // includes bidirectional communication.
 PP_Resource Create(PP_Instance instance, PP_Resource config,
                    PPB_Audio_Callback audio_callback, void* user_data) {
@@ skipping 55 matching lines @@
   // that interface in the plugin.
   EXPECT_FALSE(HasTargetProxy(INTERFACE_ID_PPB_AUDIO));
   PpapiMsg_PPBAudio_NotifyAudioStreamCreated audio_msg(
       INTERFACE_ID_PPB_AUDIO, HostResource(), 0,
       IPC::PlatformFileForTransit(), base::SharedMemoryHandle(), 0);
   plugin_dispatcher()->OnMessageReceived(audio_msg);
   EXPECT_TRUE(HasTargetProxy(INTERFACE_ID_PPB_AUDIO));
 }
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi