Use base::Clock instead of base::Time::Now in AppSearchProvider.

chrome/browser/ui/app_list/search/app_search_provider.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_SEARCH_APP_SEARCH_PROVIDER_H_
 #define CHROME_BROWSER_UI_APP_LIST_SEARCH_APP_SEARCH_PROVIDER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_vector.h"
 #include "base/scoped_observer.h"
 #include "extensions/browser/extension_registry_observer.h"
 #include "ui/app_list/search_provider.h"
 
 class AppListControllerDelegate;
 class Profile;
 
+namespace base {
+class Clock;
+}
+
 namespace extensions {
 class ExtensionRegistry;
 class ExtensionSet;
 }
 
 namespace app_list {
 
 namespace test {
 class AppSearchProviderTest;
 }
 
 class AppSearchProvider : public SearchProvider,
                           public extensions::ExtensionRegistryObserver {
  public:
   AppSearchProvider(Profile* profile,
-                    AppListControllerDelegate* list_controller);
+                    AppListControllerDelegate* list_controller,
+                    scoped_ptr<base::Clock> clock);
   ~AppSearchProvider() override;
 
   // SearchProvider overrides:
   void Start(const base::string16& query) override;
   void Stop() override;
 
  private:
   class App;
   typedef ScopedVector<App> Apps;
 
-  friend test::AppSearchProviderTest;
-
-  void StartImpl(const base::Time& current_time, const base::string16& query);
   void UpdateResults();
 
   // Adds extensions to apps container if they should be displayed.
   void AddApps(const extensions::ExtensionSet& extensions);
   void RefreshApps();
 
   // extensions::ExtensionRegistryObserver overrides:
   void OnExtensionLoaded(content::BrowserContext* browser_context,
                          const extensions::Extension* extension) override;
   void OnExtensionUninstalled(content::BrowserContext* browser_context,
                               const extensions::Extension* extension,
                               extensions::UninstallReason reason) override;
 
   Profile* profile_;
   AppListControllerDelegate* list_controller_;
 
   base::string16 query_;
-  base::Time search_time_;
 
   ScopedObserver<extensions::ExtensionRegistry,
                  extensions::ExtensionRegistryObserver>
       extension_registry_observer_;
 
   Apps apps_;
 
+  scoped_ptr<base::Clock> clock_;
+
   DISALLOW_COPY_AND_ASSIGN(AppSearchProvider);
 };
 
 }  // namespace app_list
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_SEARCH_APP_SEARCH_PROVIDER_H_