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

ppapi/proxy/proxy_channel.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/proxy_channel.h"
 
 #include "ipc/ipc_platform_file.h"
 #include "ipc/ipc_test_sink.h"
 
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 ProxyChannel::ProxyChannel(base::ProcessHandle remote_process_handle)
     : delegate_(NULL),
       remote_process_handle_(remote_process_handle),
       test_sink_(NULL) {
 }
 
 ProxyChannel::~ProxyChannel() {
 }
@@ skipping 38 matching lines @@
     return test_sink_->Send(msg);
   if (channel_.get())
     return channel_->Send(msg);
 
   // Remote side crashed, drop this message.
   delete msg;
   return false;
 }
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi