Add GetUsbKeyCode dev interface for Pepper key events

ppapi/thunk/resource_creation_api.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_THUNK_RESOURCE_CREATION_API_H_
 #define PPAPI_THUNK_RESOURCE_CREATION_API_H_
 
 #include "ppapi/c/dev/ppb_audio_input_dev.h"
 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
 #include "ppapi/c/dev/ppb_video_layer_dev.h"
@@ skipping 76 matching lines @@
   virtual PP_Resource CreateImageData(PP_Instance instance,
                                       PP_ImageDataFormat format,
                                       const PP_Size& size,
                                       PP_Bool init_to_zero) = 0;
   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,
       struct PP_Var character_text) = 0;
   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) = 0;
@@ skipping 27 matching lines @@
       const PP_FloatPoint* wheel_ticks,
       PP_Bool scroll_by_page) = 0;
 
   static const ApiID kApiID = API_ID_RESOURCE_CREATION;
 };
 
 }  // namespace thunk
 }  // namespace ppapi
 
 #endif  // PPAPI_THUNK_RESOURCE_CREATION_API_H_