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

ppapi/proxy/ppb_input_event_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_PROXY_PPB_INPUT_EVENT_PROXY_H_
 #define PPAPI_PROXY_PPB_INPUT_EVENT_PROXY_H_
 
 #include "base/basictypes.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/proxy/interface_proxy.h"
 #include "ppapi/shared_impl/input_event_impl.h"
 
 namespace ppapi {
+
 struct InputEventData;
-}
 
-namespace pp {
 namespace proxy {
 
 class PPB_InputEvent_Proxy : public InterfaceProxy {
  public:
   PPB_InputEvent_Proxy(Dispatcher* dispatcher, const void* target_interface);
   virtual ~PPB_InputEvent_Proxy();
 
   static const Info* GetInputEventInfo();
   static const Info* GetKeyboardInputEventInfo();
   static const Info* GetMouseInputEventInfo();
   static const Info* GetWheelInputEventInfo();
 
   static PP_Resource CreateProxyResource(PP_Instance instance,
                                          const ppapi::InputEventData& data);
 
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PPB_InputEvent_Proxy);
 };
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PPB_INPUT_EVENT_PROXY_H_