Completes crrev.com/23478020 and makes sure of detachment from IME.

ui/views/ime/input_method_bridge.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/views/ime/input_method_bridge.h"
 
 #include "ui/base/events/event.h"
 #include "ui/base/ime/input_method.h"
 #include "ui/gfx/rect.h"
 #include "ui/views/view.h"
@@ skipping 11 matching lines @@
   SetDelegate(delegate);
 }
 
 InputMethodBridge::~InputMethodBridge() {
   // By the time we get here it's very likely |widget_|'s NativeWidget has been
   // destroyed. This means any calls to |widget_| that go to the NativeWidget,
   // such as IsActive(), will crash. SetFocusedTextInputClient() may callback to
   // this and go into |widget_|. NULL out |widget_| so we don't attempt to use
   // it.
   DetachFromWidget();
-  if (host_->GetTextInputClient() == this)
-    host_->SetFocusedTextInputClient(NULL);
+  host_->DetachTextInputClient(this);
 }
 
 void InputMethodBridge::OnFocus() {
   // Direct the shared IME to send TextInputClient messages to |this| object.
   if (shared_input_method_ || !host_->GetTextInputClient())
     host_->SetFocusedTextInputClient(this);
 
   // TODO(yusukes): We don't need to call OnTextInputTypeChanged() once we move
   // text input type tracker code to ui::InputMethodBase.
   if (GetFocusedView())
@@ skipping 205 matching lines @@
   OnTextInputTypeChanged(focused);
   OnCaretBoundsChanged(focused);
 }
 
 ui::InputMethod* InputMethodBridge::GetHostInputMethod() const {
   return host_;
 }
 
 
 }  // namespace views