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

ppapi/proxy/ppb_memory_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_memory_proxy.h"
 
 #include "ppapi/c/dev/ppb_memory_dev.h"
 #include "ppapi/proxy/plugin_var_tracker.h"
 
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 namespace {
 
 // PPB_Memory_Dev plugin -------------------------------------------------------
 
 void* MemAlloc(uint32_t num_bytes) {
   return malloc(num_bytes);
 }
 
@@ skipping 33 matching lines @@
   return &info;
 }
 
 bool PPB_Memory_Proxy::OnMessageReceived(const IPC::Message& msg) {
   // All PPB_Memory_Dev calls are handled locally; there is no need to send or
   // receive messages here.
   return false;
 }
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi