Revert "Use libcros to convert input method ID to keyboard overlay ID."

chrome/browser/chromeos/dom_ui/keyboard_overlay_ui.cc

Index: chrome/browser/chromeos/dom_ui/keyboard_overlay_ui.cc
diff --git a/chrome/browser/chromeos/dom_ui/keyboard_overlay_ui.cc b/chrome/browser/chromeos/dom_ui/keyboard_overlay_ui.cc
index d1681902fe08711b9ef05be619e9c811156e36e8..9a2c0ceef211672a2be111d10482d7ce4240043d 100644
--- a/chrome/browser/chromeos/dom_ui/keyboard_overlay_ui.cc
+++ b/chrome/browser/chromeos/dom_ui/keyboard_overlay_ui.cc
@@ -269,12 +269,12 @@ void KeyboardOverlayHandler::RegisterMessages() {
 }
 
 void KeyboardOverlayHandler::GetKeyboardOverlayId(const ListValue* args) {
-  chromeos::InputMethodLibrary* library =
+  const chromeos::InputMethodLibrary* library =
       chromeos::CrosLibrary::Get()->GetInputMethodLibrary();
   const chromeos::InputMethodDescriptor& descriptor =
       library->current_input_method();
   const std::string keyboard_overlay_id =
-      library->GetKeyboardOverlayId(descriptor.id);
+      chromeos::input_method::GetKeyboardOverlayId(descriptor.id);
   StringValue param(keyboard_overlay_id);
   dom_ui_->CallJavascriptFunction(L"initKeyboardOverlayId", param);
 }