Add GetUsbKeyCode dev interface for Pepper key events

ppapi/api/ppb_input_event.idl

Index: ppapi/api/ppb_input_event.idl
diff --git a/ppapi/api/ppb_input_event.idl b/ppapi/api/ppb_input_event.idl
index 03d5d70d792c2356d9c968afdc0d62ab48321db7..72519c2bad6e54f197cb5bb51a14c1736238d51c 100644
--- a/ppapi/api/ppb_input_event.idl
+++ b/ppapi/api/ppb_input_event.idl
@@ -224,7 +224,16 @@ enum PP_InputEvent_Class {
    *
    * 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.

[Wez, 2012/02/07 23:48:13]

nit: I'm not convinced that this is true for low-level input.

[garykac, 2012/02/09 14:26:04]

No longer applicable.

+   */
+  PP_INPUTEVENT_CLASS_LOWLEVEL_KEYBOARD_Dev = 1 << 5
 };
 
 /**