Rewrite scoped_ptr<T>(NULL) to use the default ctor in chrome/.

chrome/browser/chromeos/input_method/candidate_window_controller_impl.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/candidate_window_controller_impl.h"
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 87 matching lines @@
       views::corewm::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE);
 #endif  // USE_ASH
 
   InfolistWindowView* infolist_view = new InfolistWindowView;
   infolist_view->Init();
   infolist_window_->SetContentsView(infolist_view);
 }
 
 CandidateWindowControllerImpl::CandidateWindowControllerImpl()
     : candidate_window_(NULL),
-      infolist_window_(NULL),
-      latest_infolist_focused_index_(InfolistWindowView::InvalidFocusIndex()) {
-}
+      latest_infolist_focused_index_(InfolistWindowView::InvalidFocusIndex()) {}
 
 CandidateWindowControllerImpl::~CandidateWindowControllerImpl() {
   if (DBusThreadManager::Get()->GetIBusPanelService())
     DBusThreadManager::Get()->GetIBusPanelService()->
         SetUpCandidateWindowHandler(NULL);
   candidate_window_->RemoveObserver(this);
 }
 
 void CandidateWindowControllerImpl::HideAuxiliaryText() {
   candidate_window_->HideAuxiliaryText();
@@ skipping 232 matching lines @@
 
   if (candidate_window_rect.y() + infolist_window_size.height() >
       screen_rect.bottom())
     result.set_y(screen_rect.bottom() - infolist_window_size.height());
 
   return result;
 }
 
 }  // namespace input_method
 }  // namespace chromeos