Refactor app_list_util.h into AppListService abstract base.

chrome/browser/ui/cocoa/app_list/app_list_service_cocoa.h

Index: chrome/browser/ui/cocoa/app_list/app_list_service_cocoa.h
diff --git a/chrome/browser/ui/cocoa/app_list/app_list_service_cocoa.h b/chrome/browser/ui/cocoa/app_list/app_list_service_cocoa.h
new file mode 100644
index 0000000000000000000000000000000000000000..dc54d2b3bc79b32ddcf3ba5c84850a0bbf6e43e8
--- /dev/null
+++ b/chrome/browser/ui/cocoa/app_list/app_list_service_cocoa.h
@@ -0,0 +1,19 @@
+// Copyright 2013 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 CHROME_BROWSER_UI_VIEWS_APP_LIST_APP_LIST_SERVICE_COCOA_H_
+#define CHROME_BROWSER_UI_VIEWS_APP_LIST_APP_LIST_SERVICE_COCOA_H_
+
+#include "chrome/browser/ui/app_list_service.h"
+
+class AppListServiceCocoa : public AppListService {
+ public:
+  static AppListServiceCocoa* GetInstance();
+ protected:
+  AppListServiceCocoa() {}
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AppListServiceCocoa);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_APP_LIST_APP_LIST_SERVICE_COCOA_H_