[FYI] All-in-one OnCandidateWindow{Show,Update,Hide}

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/bind.h"
 #include "base/logging.h"
+#include "base/message_loop/message_loop.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"
 #include "ui/events/event.h"
 
 namespace ui {
 
 InputMethodBase::InputMethodBase()
   : delegate_(NULL),
     text_input_client_(NULL),
@@ skipping 105 matching lines @@
     TextInputClient* client) {
   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_);
 }
 
+void InputMethodBase::OnCandidateWindowShown() {
+  base::MessageLoop::current()->PostTask(
+      FROM_HERE,
+      base::Bind(&InputMethodBase::CandidateWindowShownCallback, AsWeakPtr()));
+}
+
+void InputMethodBase::OnCandidateWindowUpdated() {
+  base::MessageLoop::current()->PostTask(
+      FROM_HERE,
+      base::Bind(&InputMethodBase::CandidateWindowUpdatedCallback,
+                 AsWeakPtr()));
+}
+
+void InputMethodBase::OnCandidateWindowHidden() {
+  base::MessageLoop::current()->PostTask(
+      FROM_HERE,
+      base::Bind(&InputMethodBase::CandidateWindowHiddenCallback, AsWeakPtr()));
+}
+
+void InputMethodBase::CandidateWindowShownCallback() {
+  if (text_input_client_)
+    text_input_client_->OnCandidateWindowShown();
+}
+
+void InputMethodBase::CandidateWindowUpdatedCallback() {
+  if (text_input_client_)
+    text_input_client_->OnCandidateWindowUpdated();
+}
+
+void InputMethodBase::CandidateWindowHiddenCallback() {
+  if (text_input_client_)
+    text_input_client_->OnCandidateWindowHidden();
+}
+
 }  // namespace ui