aura: Fix shift/ctrl/alt keyevents with RWHVA and X11.

ui/base/keycodes/keyboard_code_conversion_x.h

Index: ui/base/keycodes/keyboard_code_conversion_x.h
diff --git a/ui/base/keycodes/keyboard_code_conversion_x.h b/ui/base/keycodes/keyboard_code_conversion_x.h
index 17eab247413983d1cfb7c6f7292fc09fcb27bdc3..e42e02f6c6a08136cad1bbd8a6d52286d8bf0523 100644
--- a/ui/base/keycodes/keyboard_code_conversion_x.h
+++ b/ui/base/keycodes/keyboard_code_conversion_x.h
@@ -16,8 +16,11 @@ UI_EXPORT KeyboardCode KeyboardCodeFromXKeyEvent(XEvent* xev);
 
 UI_EXPORT KeyboardCode KeyboardCodeFromXKeysym(unsigned int keysym);
 
-// Converts a hardware keycode into a key symbol on a standard US PC keyboard.
-UI_EXPORT unsigned int DefaultXKeysymFromHardwareKeycode(unsigned int keycode);
+// Returns a key symbol on a standard US PC keyboard from an XEvent.
+UI_EXPORT unsigned int DefaultSymbolFromXEvent(XEvent* xev);
+
+// Converts an X keycode into an X KeySym.
+unsigned int DefaultXKeysymFromHardwareKeycode(unsigned int keycode);
 
 }  // namespace ui