Get rid of unused callbacks from ui::InputMethodObserver

ui/base/ime/input_method_base.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 "ui/base/ime/input_method_base.h"
 
 #include "base/logging.h"
 #include "ui/base/ime/input_method_delegate.h"
 #include "ui/base/ime/input_method_observer.h"
 #include "ui/base/ime/text_input_client.h"
@@ skipping 52 matching lines @@
 }
 
 void InputMethodBase::OnCaretBoundsChanged(const TextInputClient* client) {
   if (!IsTextInputClientFocused(client))
     return;
   FOR_EACH_OBSERVER(InputMethodObserver,
                     observer_list_,
                     OnCaretBoundsChanged(client));
 }
 
-void InputMethodBase::OnInputLocaleChanged() {
-  FOR_EACH_OBSERVER(InputMethodObserver,
-                    observer_list_,
-                    OnInputLocaleChanged());
-}
-
 TextInputType InputMethodBase::GetTextInputType() const {
   TextInputClient* client = GetTextInputClient();
   return client ? client->GetTextInputType() : TEXT_INPUT_TYPE_NONE;
 }
 
 TextInputMode InputMethodBase::GetTextInputMode() const {
   TextInputClient* client = GetTextInputClient();
   return client ? client->GetTextInputMode() : TEXT_INPUT_MODE_DEFAULT;
 }
 
@@ skipping 48 matching lines @@
   TextInputClient* old = text_input_client_;
   if (old == client)
     return;
   OnWillChangeFocusedClient(old, client);
   text_input_client_ = client;  // NULL allowed.
   OnDidChangeFocusedClient(old, client);
   NotifyTextInputStateChanged(text_input_client_);
 }
 
 }  // namespace ui