Support uninstalling ARC app from Chrome launcher

chrome/browser/ui/app_list/arc/arc_app_test.h

 // Copyright 2016 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_ARC_ARC_APP_TEST_H_
 #define CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_TEST_H_
 
+#include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace arc {
 class AppInfo;
 class FakeArcBridgeService;
 class FakeAppInstance;
 }
 
 namespace content {
 class BrowserContext;
 }
 
 // Helper class to initialize arc bridge to work with arc apps in unit tests.
 class ArcAppTest {
  public:
   ArcAppTest();
   virtual ~ArcAppTest();
 
   void SetUp(content::BrowserContext* browser_context);
 
   static std::string GetAppId(const arc::AppInfo& app_info);
 
+  // The 0th item is sticky but not the followings.
   const std::vector<arc::AppInfo>& fake_apps() const { return fake_apps_; }
 
   arc::FakeArcBridgeService* bridge_service() { return bridge_service_.get(); }
 
   arc::FakeAppInstance* app_instance() { return app_instance_.get(); }
 
  private:
   // Unowned pointer.
   content::BrowserContext* browser_context_ = nullptr;
 
   scoped_ptr<arc::FakeArcBridgeService> bridge_service_;
   scoped_ptr<arc::FakeAppInstance> app_instance_;
   std::vector<arc::AppInfo> fake_apps_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAppTest);
 };
 
-#endif // CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_TEST_H_
-
+#endif  // CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_TEST_H_