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

ppapi/proxy/ppb_var_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/ppb_var_proxy.h"
 
 #include "ppapi/c/pp_var.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/proxy/plugin_resource_tracker.h"
 #include "ppapi/proxy/plugin_var_tracker.h"
 #include "ppapi/shared_impl/var.h"
 
-using ppapi::StringVar;
-
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 namespace {
 
 // PPP_Var plugin --------------------------------------------------------------
 
 void AddRefVar(PP_Var var) {
   PluginResourceTracker::GetInstance()->var_tracker().AddRefVar(var);
 }
 
@@ skipping 49 matching lines @@
   return &info;
 }
 
 bool PPB_Var_Proxy::OnMessageReceived(const IPC::Message& msg) {
   // All PPB_Var calls are handled locally; there is no need to send or receive
   // messages here.
   return false;
 }
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi