Extract a delegate interface from c/b/input_method to permit decoupling from c/b.

chrome/browser/chromeos/input_method/input_method_manager.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 "chrome/browser/chromeos/input_method/input_method_manager.h"
 
+#include "chrome/browser/chromeos/input_method/input_method_delegate_impl.h"
 #include "chrome/browser/chromeos/input_method/input_method_manager_impl.h"
 
 namespace chromeos {
 namespace input_method {
 
 namespace {
 InputMethodManager* g_input_method_manager = NULL;
 }  // namespace
 
 // static
 void InputMethodManager::Initialize() {
   DCHECK(!g_input_method_manager);
-  InputMethodManagerImpl* impl = new InputMethodManagerImpl;
+  InputMethodManagerImpl* impl = new InputMethodManagerImpl(
+      scoped_ptr<InputMethodDelegate>(new InputMethodDelegateImpl));
   impl->Init();
   g_input_method_manager = impl;
   DVLOG(1) << "InputMethodManager initialized";
 }
 
 // static
 void InputMethodManager::InitializeForTesting(
     InputMethodManager* mock_manager) {
   DCHECK(!g_input_method_manager);
   g_input_method_manager = mock_manager;
   DVLOG(1) << "InputMethodManager for testing initialized";
 }
 
 // static
 void InputMethodManager::Shutdown() {
   delete g_input_method_manager;
   g_input_method_manager = NULL;
   DVLOG(1) << "InputMethodManager shutdown";
 }
 
 // static
 InputMethodManager* InputMethodManager::GetInstance() {
   DCHECK(g_input_method_manager);
   return g_input_method_manager;
 }
 
 }  // namespace input_method
 }  // namespace chromeos