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

ppapi/proxy/plugin_message_filter.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_PLUGIN_MESSAGE_FILTER_H_
 #define PPAPI_PROXY_PLUGIN_MESSAGE_FILTER_H_
 
 #include <set>
 
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_message.h"
 #include "ppapi/c/pp_instance.h"
 
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 // Listens for messages on the I/O thread of the plugin and handles some of
 // them to avoid needing to block on the plugin.
 //
 // There is one instance of this class for each renderer channel (same as for
 // the PluginDispatchers).
 class PluginMessageFilter : public IPC::ChannelProxy::MessageFilter,
                             public IPC::Message::Sender {
  public:
@@ skipping 19 matching lines @@
   // used to make sure that new instance IDs are unique. This is a non-owning
   // pointer, it will be managed by the later that creates this class.
   std::set<PP_Instance>* seen_instance_ids_;
 
   // The IPC channel to the renderer. May be NULL if we're not currently
   // attached as a filter.
   IPC::Channel* channel_;
 };
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PLUGIN_MESSAGE_FILTER_H_