Refactor app_list_util.h into AppListService abstract base.

chrome/browser/ui/app_list/app_list_service_ash.h

+// 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_APP_LIST_APP_LIST_SERVICE_ASH_H_
+#define CHROME_BROWSER_UI_APP_LIST_APP_LIST_SERVICE_ASH_H_
+
+#include "chrome/browser/ui/app_list/app_list_service.h"
+
+class AppListServiceAsh : public AppListService {

[tapted, 2013/02/19 03:35:06]

So tempting just to declare these in app_list_selector.cc as single, function
"forward" decs..... i.e.

app_list_service_selector.cc:
namespace chrome {
AppListService* GetAppListServiceAsh();
AppListService* GetAppListServiceCocoa();
AppListService* GetAppListServiceWin();
}

app_list_service_ash.cc:
namespace chrome {
AppListService* GetAppListServiceAsh() {
  return AppListServiceAsh::GetInstance();
}

//etc.

Maybe that's too evil..

+ public:
+  static AppListServiceAsh* GetInstance();
+ protected:
+  AppListServiceAsh() {}
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AppListServiceAsh);
+};
+
+#endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_SERVICE_ASH_H_