Chrome Linux DRT nativeKeyCode helper

ui/base/keycodes/keyboard_code_conversion_gtk.h

Index: ui/base/keycodes/keyboard_code_conversion_gtk.h
diff --git ui/base/keycodes/keyboard_code_conversion_gtk.h ui/base/keycodes/keyboard_code_conversion_gtk.h
index 6a9d293..7a4e167 100644
--- ui/base/keycodes/keyboard_code_conversion_gtk.h
+++ ui/base/keycodes/keyboard_code_conversion_gtk.h
@@ -48,6 +48,11 @@ UI_EXPORT KeyboardCode WindowsKeyCodeForGdkKeyCode(int keycode);
 
 UI_EXPORT int GdkKeyCodeForWindowsKeyCode(KeyboardCode keycode, bool shift);
 
+// For WebKit DRT testing: simulate the native keycode for the given
+// input |keycode|.  Return the native keycode.
+UI_EXPORT int GdkNativeKeyCodeForWindowsKeyCode(KeyboardCode keycode,
+                                                bool shift);
+
 UI_EXPORT KeyboardCode KeyboardCodeFromGdkEventKey(GdkEventKey* event);
 
 } // namespace ui