Use a direct include of strings headers in ui/, part 1.

ui/app_list/search_result.h

 // 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.
 
 #ifndef UI_APP_LIST_SEARCH_RESULT_H_
 #define UI_APP_LIST_SEARCH_RESULT_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "ui/app_list/app_list_export.h"
 #include "ui/base/models/list_model.h"
 #include "ui/base/range/range.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace ui {
 class MenuModel;
 }
 
 namespace app_list {
@@ skipping 87 matching lines @@
   ActionIconSets action_icons_;
 
   ObserverList<SearchResultObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchResult);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_SEARCH_RESULT_H_