[Suggestions Service] Add support for expiring the SuggestionsStore

components/suggestions/suggestions_service.h

Index: components/suggestions/suggestions_service.h
diff --git a/components/suggestions/suggestions_service.h b/components/suggestions/suggestions_service.h
index ee1ed92ca6afa4f288d455684c805d8aef3cb87b..e1e7c0f0cdb70bb6b983ecc1e4f463ba2a9f1dfb 100644
--- a/components/suggestions/suggestions_service.h
+++ b/components/suggestions/suggestions_service.h
@@ -45,6 +45,8 @@ extern const char kSuggestionsFieldTrialStateParam[];
 extern const char kSuggestionsFieldTrialControlParam[];
 extern const char kSuggestionsFieldTrialStateEnabled[];
 
+extern const int64 kDefaultExpiryUsec;
+
 // An interface to fetch server suggestions asynchronously.
 class SuggestionsService : public KeyedService, public net::URLFetcherDelegate {
  public:
@@ -92,6 +94,9 @@ class SuggestionsService : public KeyedService, public net::URLFetcherDelegate {
   // Register SuggestionsService related prefs in the Profile prefs.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
+  // Sets default timestamp for suggestions which do not have expiry timestamp.
+  void SetDefaultExpiryTimestamps(SuggestionsProfile* suggestions,
+      int64 timestamp_usec);

[manzagop (departed), 2014/08/04 19:02:59]

nit: I'd align this with SuggestionsProfile.

[gayane -on leave until 09-2017, 2014/08/04 19:26:44]

Done.

  private:
   FRIEND_TEST_ALL_PREFIXES(SuggestionsServiceTest, BlacklistURLFails);
   FRIEND_TEST_ALL_PREFIXES(SuggestionsServiceTest, FetchSuggestionsData);