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

ppapi/proxy/ppb_memory_proxy.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_PPB_MEMORY_PROXY_H_
 #define PPAPI_PPB_MEMORY_PROXY_H_
 
 #include "ppapi/proxy/interface_proxy.h"
 
 struct PPB_Memory_Dev;
 
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 class PPB_Memory_Proxy : public InterfaceProxy {
  public:
   PPB_Memory_Proxy(Dispatcher* dispatcher,
                    const void* target_interface);
   virtual ~PPB_Memory_Proxy();
 
   static const Info* GetInfo();
 
   const PPB_Memory_Dev* ppb_memory_target() const {
     return static_cast<const PPB_Memory_Dev*>(target_interface());
   }
 
   // InterfaceProxy implementation. In this case, no messages are sent or
   // received, so this always returns false.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
 };
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi
 
 #endif  // PPAPI_PPB_MEMORY_PROXY_H_