Add GetUsbKeyCode dev interface for Pepper key events

ppapi/proxy/resource_creation_proxy.h

 // Copyright (c) 2012 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_RESOURCE_CREATION_PROXY_H_
 #define PPAPI_PROXY_RESOURCE_CREATION_PROXY_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 73 matching lines @@
   virtual PP_Resource CreateImageData(PP_Instance instance,
                                       PP_ImageDataFormat format,
                                       const PP_Size& size,
                                       PP_Bool init_to_zero) OVERRIDE;
   virtual PP_Resource CreateKeyboardInputEvent(
       PP_Instance instance,
       PP_InputEvent_Type type,
       PP_TimeTicks time_stamp,
       uint32_t modifiers,
       uint32_t key_code,
+      uint32_t usb_scan_code,
       PP_Var character_text) OVERRIDE;
   virtual PP_Resource CreateMouseInputEvent(
       PP_Instance instance,
       PP_InputEvent_Type type,
       PP_TimeTicks time_stamp,
       uint32_t modifiers,
       PP_InputEvent_MouseButton mouse_button,
       const PP_Point* mouse_position,
       int32_t click_count,
       const PP_Point* mouse_movement) OVERRIDE;
@@ skipping 31 matching lines @@
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ResourceCreationProxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_RESOURCE_CREATION_PROXY_H_