Add InputMethodObserver support into InputMethodBase

ui/base/ime/input_method_tsf.cc

 // Copyright (c) 2013 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_tsf.h"
 
 #include "ui/base/ime/text_input_client.h"
 #include "ui/base/ime/win/tsf_bridge.h"
 #include "ui/base/ime/win/tsf_event_router.h"
 
@@ skipping 90 matching lines @@
   if (IsTextInputClientFocused(client) && IsWindowFocused(client)) {
     ui::TSFBridge::GetInstance()->CancelComposition();
     ui::TSFBridge::GetInstance()->OnTextInputTypeChanged(client);
   }
   InputMethodWin::OnTextInputTypeChanged(client);
 }
 
 void InputMethodTSF::OnCaretBoundsChanged(const TextInputClient* client) {
   if (IsTextInputClientFocused(client) && IsWindowFocused(client))
     ui::TSFBridge::GetInstance()->OnTextLayoutChanged();
+  InputMethodWin::OnCaretBoundsChanged(client);
 }
 
 void InputMethodTSF::CancelComposition(const TextInputClient* client) {
   if (IsTextInputClientFocused(client) && IsWindowFocused(client))
     ui::TSFBridge::GetInstance()->CancelComposition();
 }
 
 void InputMethodTSF::DetachTextInputClient(TextInputClient* client) {
   InputMethodWin::DetachTextInputClient(client);
   ui::TSFBridge::GetInstance()->RemoveFocusedClient(client);
@@ skipping 27 matching lines @@
     OnCaretBoundsChanged(focused);
   }
 }
 
 void InputMethodTSF::ConfirmCompositionText() {
   if (!IsTextInputTypeNone())
     ui::TSFBridge::GetInstance()->ConfirmComposition();
 }
 
 }  // namespace ui