SuggestionsStore unittests not using real time.

components/suggestions/suggestions_store.h

 // Copyright 2014 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 COMPONENTS_SUGGESTIONS_SUGGESTIONS_STORE_H_
 #define COMPONENTS_SUGGESTIONS_SUGGESTIONS_STORE_H_
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/time/clock.h"
 #include "components/suggestions/proto/suggestions.pb.h"
 
 class PrefService;
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }  // namespace user_prefs
 
 namespace suggestions {
 
@@ skipping 13 matching lines @@
   // Stores the provided |suggestions| to the profile's preferences, using
   // a base64 encoding of its protobuf serialization.
   virtual bool StoreSuggestions(const SuggestionsProfile& suggestions);
 
   // Clears any suggestion data from the profile's preferences.
   virtual void ClearSuggestions();
 
   // Register SuggestionsStore related prefs in the Profile prefs.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
+  // Gains ownership of |clock|.

[Matt Giuca, 2014/12/18 22:51:13]

Nit: This comment is not necessary (the ownership transfer is implied by
scoped_ptr).

[gayane -on leave until 09-2017, 2014/12/22 16:29:38]

Done.

+  void SetClockForTesting(scoped_ptr<base::Clock> clock);
+
  protected:
   // Test seam. For simplicity of mock creation.
-  SuggestionsStore() {}
+  SuggestionsStore();
 
  private:
   // The pref service used to persist the suggestions data.
   PrefService* pref_service_;
+  // Can be set for testing.
+  scoped_ptr<base::Clock> clock_;
 
   DISALLOW_COPY_AND_ASSIGN(SuggestionsStore);
 
   // Filters expired suggestions.
   void FilterExpiredSuggestions(SuggestionsProfile* suggestions);
 };
 
 }  // namespace suggestions
 
 #endif  // COMPONENTS_SUGGESTIONS_SUGGESTIONS_STORE_H_