Do not use ui::GetCharacterFromXEvent when Control is pressed.

ui/base/ime/input_method_ibus.cc

Index: ui/base/ime/input_method_ibus.cc
diff --git a/ui/base/ime/input_method_ibus.cc b/ui/base/ime/input_method_ibus.cc
index 661495dbb4a72903004d6736a4358166d47c7ba6..afc657e7cff85c00a6b7faf1b2c5c545db585519 100644
--- a/ui/base/ime/input_method_ibus.cc
+++ b/ui/base/ime/input_method_ibus.cc
@@ -653,7 +653,9 @@ void InputMethodIBus::ProcessUnfilteredKeyPressEvent(
 
   const uint32 state =
       EventFlagsFromXFlags(GetKeyEvent(native_event)->state);
-  uint16 ch = ui::GetCharacterFromXEvent(native_event);
+  uint16 ch = 0;
+  if (!(state & ui::EF_CONTROL_DOWN))
+    ch = ui::GetCharacterFromXEvent(native_event);
   if (!ch) {
     ch = ui::GetCharacterFromKeyCode(
         ui::KeyboardCodeFromNative(native_event), state);