Proof of concept implementation of context based history filtering.

components/history/core/browser/history_types.cc

 // 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.
 
 #include "components/history/core/browser/history_types.h"
 
 #include <limits>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "components/history/core/browser/page_usage_data.h"
 
 namespace history {
 
 // VisitRow --------------------------------------------------------------------
 
 VisitRow::VisitRow()
     : visit_id(0),
       url_id(0),
       referring_visit(0),
       transition(ui::PAGE_TRANSITION_LINK),
-      segment_id(0) {
+      segment_id(0),
+      context(HistoryContext::CONTEXT_NONE) {
 }
 
 VisitRow::VisitRow(URLID arg_url_id,
                    base::Time arg_visit_time,
                    VisitID arg_referring_visit,
                    ui::PageTransition arg_transition,
                    SegmentID arg_segment_id)
     : visit_id(0),
       url_id(arg_url_id),
       visit_time(arg_visit_time),
@@ skipping 288 matching lines @@
 
 void ExpireHistoryArgs::SetTimeRangeForOneDay(base::Time time) {
   begin_time = time.LocalMidnight();
 
   // Due to DST, leap seconds, etc., the next day at midnight may be more than
   // 24 hours away, so add 36 hours and round back down to midnight.
   end_time = (begin_time + base::TimeDelta::FromHours(36)).LocalMidnight();
 }
 
 }  // namespace history