Add GetUsbKeyCode dev interface for Pepper key events

ppapi/c/ppb_input_event.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.
  */
 
-/* From ppb_input_event.idl modified Mon Nov 14 10:36:01 2011. */
+/* From ppb_input_event.idl modified Mon Feb  6 17:00:27 2012. */
 
 #ifndef PPAPI_C_PPB_INPUT_EVENT_H_
 #define PPAPI_C_PPB_INPUT_EVENT_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_point.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
@@ skipping 209 matching lines @@
    * Request touch events only if you intend to handle them. If the browser
    * knows you do not need to handle touch events, it can handle them at a
    * higher level and achieve higher performance.
    */
   PP_INPUTEVENT_CLASS_TOUCH = 1 << 3,
   /**
    * Identifies IME composition input events.
    *
    * Request this input event class if you allow on-the-spot IME input.
    */
-  PP_INPUTEVENT_CLASS_IME = 1 << 4
+  PP_INPUTEVENT_CLASS_IME = 1 << 4,
+  /**
+   * Requests low-level keyboard events. Instead of Windows virtual key code,
+   * this will return USB scan codes for each key press.
+   *
+   * As with PP_INPUTEVENT_CLASS_KEYBOARD, you will usually want to request
+   * filtered mode so you can pass on the events.
+   */
+  PP_INPUTEVENT_CLASS_LOWLEVEL_KEYBOARD_Dev = 1 << 5
 } PP_InputEvent_Class;
 PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_InputEvent_Class, 4);
 /**
  * @}
  */
 
 /**
  * @addtogroup Interfaces
  * @{
  */
@@ skipping 458 matching lines @@
   struct PP_Var (*GetCharacterText)(PP_Resource character_event);
 };
 
 typedef struct PPB_KeyboardInputEvent_1_0 PPB_KeyboardInputEvent;
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_PPB_INPUT_EVENT_H_ */