Implement virtual keyboard hiding.

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 24 matching lines @@
 void InputMethodBase::OnFocus() {
   DCHECK(!system_toplevel_window_focused_);
   system_toplevel_window_focused_ = true;
 }
 
 void InputMethodBase::OnBlur() {
   DCHECK(system_toplevel_window_focused_);
   system_toplevel_window_focused_ = false;
 }
 
+void InputMethodBase::OnPossibleRefocus() {
+  NotifyTextInputStateChanged(text_input_client_);
+}
+
 void InputMethodBase::SetFocusedTextInputClient(TextInputClient* client) {
   TextInputClient* old = text_input_client_;
   OnWillChangeFocusedClient(old, client);
   text_input_client_ = client;  // NULL allowed.
   OnDidChangeFocusedClient(old, client);
 
   if (old != text_input_client_)
     NotifyTextInputStateChanged(text_input_client_);
 }
 
@@ skipping 52 matching lines @@
 }
 
 void InputMethodBase::NotifyTextInputStateChanged(
     const TextInputClient* client) {
   FOR_EACH_OBSERVER(InputMethodObserver,
                     observer_list_,
                     OnTextInputStateChanged(client));
 }
 
 }  // namespace ui