Proof of concept implementation of context based history filtering.

chrome/browser/ui/webui/history_ui.h

 // Copyright (c) 2012 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_HISTORY_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_
 
 #include <string>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 29 matching lines @@
   struct HistoryEntry {
     // Values indicating whether an entry represents only local visits, only
     // remote visits, or a mixture of both.
     enum EntryType {
       EMPTY_ENTRY = 0,
       LOCAL_ENTRY,
       REMOTE_ENTRY,
       COMBINED_ENTRY
     };
 
-    HistoryEntry(EntryType type, const GURL& url, const base::string16& title,
+    HistoryEntry(EntryType type, const GURL& url, const base::string16& title, history::HistoryContext context,
                  base::Time time, const std::string& client_id,
                  bool is_search_result, const base::string16& snippet,
                  bool blocked_visit, const std::string& accept_languages);
     HistoryEntry();
     virtual ~HistoryEntry();
 
     // Formats this entry's URL and title and adds them to |result|.
     void SetUrlAndTitle(base::DictionaryValue* result) const;
 
     // Converts the entry to a DictionaryValue to be owned by the caller.
     scoped_ptr<base::DictionaryValue> ToValue(
         bookmarks::BookmarkModel* bookmark_model,
         SupervisedUserService* supervised_user_service,
         const ProfileSyncService* sync_service) 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.
+    history::HistoryContext context;
 
     // The time of the entry. Usually this will be the time of the most recent
     // visit to |url| on a particular day as defined in the local timezone.
     base::Time time;
 
     // The sync ID of the client on which the most recent visit occurred.
     std::string client_id;
 
     // Timestamps of all local or remote visits the same URL on the same day.
     std::set<int64> all_timestamps;
@@ skipping 136 matching lines @@
   explicit HistoryUI(content::WebUI* web_ui);
 
   static base::RefCountedMemory* GetFaviconResourceBytes(
       ui::ScaleFactor scale_factor);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HistoryUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_