Supports unicode composition(Ctrl+Shift+U) with C-S pressed.

ui/base/ime/input_method_ibus_unittest.cc

 // 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.
 
 #include <X11/Xlib.h>
 #undef Bool
 #undef FocusIn
 #undef FocusOut
 #undef None
 
@@ skipping 74 matching lines @@
   struct IBusKeyEventFromNativeKeyEventResult {
     IBusKeyEventFromNativeKeyEventResult() : keyval(0), keycode(0), state(0) {}
     uint32 keyval;
     uint32 keycode;
     uint32 state;
   };
 
   // InputMethodIBus override.
   virtual void ProcessKeyEventPostIME(const base::NativeEvent& native_key_event,
                                       uint32 ibus_keyval,
+                                      uint32 ibus_keycode,
+                                      uint32 ibus_state,
                                       bool handled) OVERRIDE {
     process_key_event_post_ime_args_.event = *native_key_event;
     process_key_event_post_ime_args_.ibus_keyval = ibus_keyval;
     process_key_event_post_ime_args_.handled = handled;
     ++process_key_event_post_ime_call_count_;
   }
 
   // We can't call X11 related function without display in unit test, so
   // override with mock function.
   virtual void IBusKeyEventFromNativeKeyEvent(
@@ skipping 1617 matching lines @@
 
   // Do callback.
   success_consume_handler.RunCallback(KEYEVENT_CONSUME);
 
   EXPECT_EQ(0, ime_->process_key_event_post_ime_call_count());
 }
 
 // TODO(nona): Introduce ProcessKeyEventPostIME tests(crbug.com/156593).
 
 }  // namespace ui