[Suggestions Service] Add support for expiring the SuggestionsStore

components/suggestions/suggestions_service.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_SERVICE_H_
 #define COMPONENTS_SUGGESTIONS_SUGGESTIONS_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 26 matching lines @@
 class SuggestionsStore;
 
 extern const char kSuggestionsFieldTrialName[];
 extern const char kSuggestionsFieldTrialURLParam[];
 extern const char kSuggestionsFieldTrialCommonParamsParam[];
 extern const char kSuggestionsFieldTrialBlacklistPathParam[];
 extern const char kSuggestionsFieldTrialBlacklistUrlParam[];
 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:
   typedef base::Callback<void(const SuggestionsProfile&)> ResponseCallback;
 
   SuggestionsService(
       net::URLRequestContextGetter* url_request_context,
       scoped_ptr<SuggestionsStore> suggestions_store,
       scoped_ptr<ImageManager> thumbnail_manager,
@@ skipping 28 matching lines @@
   void BlacklistURL(const GURL& candidate_url,
                     const ResponseCallback& callback);
 
   // Determines which URL a blacklist request was for, irrespective of the
   // request's status. Returns false if |request| is not a blacklist request.
   static bool GetBlacklistedUrl(const net::URLFetcher& request, GURL* url);
 
   // 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 SetDefaultExpiryTimestamp(SuggestionsProfile* suggestions,
+                                 int64 timestamp_usec);
  private:
   FRIEND_TEST_ALL_PREFIXES(SuggestionsServiceTest, BlacklistURLFails);
   FRIEND_TEST_ALL_PREFIXES(SuggestionsServiceTest, FetchSuggestionsData);
   FRIEND_TEST_ALL_PREFIXES(SuggestionsServiceTest, UpdateBlacklistDelay);
 
   // Issue a request.
   void IssueRequest(const GURL& url);
 
   // Creates a request to the suggestions service, properly setting headers.
   net::URLFetcher* CreateSuggestionsRequest(const GURL& url);
@@ skipping 75 matching lines @@
   // Timeout (in ms) before serving requestors after a fetch suggestions request
   // has been issued.
   int request_timeout_ms_;
 
   DISALLOW_COPY_AND_ASSIGN(SuggestionsService);
 };
 
 }  // namespace suggestions
 
 #endif  // COMPONENTS_SUGGESTIONS_SUGGESTIONS_SERVICE_H_