MD History: truncate title to 300 chars in C++ instead of JS

chrome/browser/ui/webui/browsing_history_handler.h

 // Copyright 2015 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_WEBUI_BROWSING_HISTORY_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_BROWSING_HISTORY_HANDLER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 52 matching lines @@
 
     HistoryEntry(EntryType type, const GURL& url, const base::string16& title,
                  base::Time time, const std::string& client_id,
                  bool is_search_result, const base::string16& snippet,
                  bool blocked_visit);
     HistoryEntry();
     HistoryEntry(const HistoryEntry& other);
     virtual ~HistoryEntry();
 
     // Formats this entry's URL and title and adds them to |result|.
-    void SetUrlAndTitle(base::DictionaryValue* result) const;
+    void SetUrlAndTitle(base::DictionaryValue* result,
+                        bool limit_title_length) const;
 
     // Converts the entry to a DictionaryValue to be owned by the caller.
     std::unique_ptr<base::DictionaryValue> ToValue(
         bookmarks::BookmarkModel* bookmark_model,
         SupervisedUserService* supervised_user_service,
-        const ProfileSyncService* sync_service) const;
+        const ProfileSyncService* sync_service,
+        bool limit_title_length) const;
 
     // Comparison function for sorting HistoryEntries from newest to oldest.
     static bool SortByTimeDescending(
         const HistoryEntry& entry1, const HistoryEntry& entry2);
 
     // The type of visits this entry represents: local, remote, or both.
     EntryType entry_type;
 
     GURL url;
     base::string16 title;  // Title of the entry. May be empty.
@@ skipping 38 matching lines @@
 
   // Handler for "removeBookmark" message.
   void HandleRemoveBookmark(const base::ListValue* args);
 
   // Merges duplicate entries from the query results, only retaining the most
   // recent visit to a URL on a particular day. That visit contains the
   // timestamps of the other visits.
   static void MergeDuplicateResults(
       std::vector<BrowsingHistoryHandler::HistoryEntry>* results);
 
+ protected:
+  // Callback from the history system when a history query has completed.
+  // Exposed for testing.
+  void QueryComplete(const base::string16& search_text,
+                     const history::QueryOptions& options,
+                     history::QueryResults* results);
+
  private:
   // The range for which to return results:
   // - ALLTIME: allows access to all the results in a paginated way.
   // - WEEK: the last 7 days.
   // - MONTH: the last calendar month.
   enum Range {
     ALL_TIME = 0,
     WEEK = 1,
     MONTH = 2
   };
 
   // Core implementation of history querying.
   void QueryHistory(const base::string16& search_text,
                     const history::QueryOptions& options);
 
   // Combines the query results from the local history database and the history
   // server, and sends the combined results to the front end.
   void ReturnResultsToFrontEnd();
 
   // Callback from |web_history_timer_| when a response from web history has
   // not been received in time.
   void WebHistoryTimeout();
 
-  // Callback from the history system when a history query has completed.
-  void QueryComplete(const base::string16& search_text,
-                     const history::QueryOptions& options,
-                     history::QueryResults* results);
-
   // Callback from the WebHistoryService when a query has completed.
   void WebHistoryQueryComplete(const base::string16& search_text,
                                const history::QueryOptions& options,
                                base::TimeTicks start_time,
                                history::WebHistoryService::Request* request,
                                const base::DictionaryValue* results_value);
 
   // Callback telling us whether other forms of browsing history were found
   // on the history server.
   void OtherFormsOfBrowsingHistoryQueryComplete(
@@ skipping 72 matching lines @@
 
   // Whether there are other forms of browsing history on the history server.
   bool has_other_forms_of_browsing_history_;
 
   base::WeakPtrFactory<BrowsingHistoryHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingHistoryHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_BROWSING_HISTORY_HANDLER_H_