Only initialize the input method list for once, no need to re-initialize for each profile.

chrome/browser/chromeos/input_method/mock_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/mock_input_method_manager.h"
 
 namespace chromeos {
 namespace input_method {
 
 MockInputMethodManager::MockInputMethodManager()
     : add_observer_count_(0),
       remove_observer_count_(0),
       util_(&delegate_),
       mod3_used_(false) {
   active_input_method_ids_.push_back("xkb:us::eng");
 }
 
 MockInputMethodManager::~MockInputMethodManager() {
 }
 
-void MockInputMethodManager::InitializeComponentExtension() {
-}
-
 InputMethodManager::State MockInputMethodManager::GetState() {
   return InputMethodManager::STATE_BROWSER_SCREEN;
 }
 
 void MockInputMethodManager::AddObserver(
     InputMethodManager::Observer* observer) {
   ++add_observer_count_;
 }
 
 void MockInputMethodManager::AddCandidateWindowObserver(
@@ skipping 157 matching lines @@
   return true;
 }
 
 bool MockInputMethodManager::MigrateInputMethods(
     std::vector<std::string>* input_method_ids) {
   return false;
 }
 
 }  // namespace input_method
 }  // namespace chromeos