Port HistoryService::QueryFilteredURLs to CancelableRequestTracker

chrome/browser/history/history_types.h

Index: chrome/browser/history/history_types.h
diff --git a/chrome/browser/history/history_types.h b/chrome/browser/history/history_types.h
index 81d88d91651406a9ad9009878cdddcdd2be1b092..d2702ec5b16a4344f62a4a25026b85d1b53c1d2c 100644
--- a/chrome/browser/history/history_types.h
+++ b/chrome/browser/history/history_types.h
@@ -17,7 +17,6 @@
 #include "base/memory/scoped_vector.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
-#include "chrome/common/ref_counted_util.h"
 #include "components/favicon_base/favicon_types.h"
 #include "components/history/core/browser/url_row.h"
 #include "components/history/core/common/thumbnail_score.h"
@@ -38,10 +37,6 @@ namespace history {
 class HistoryBackend;
 class URLDatabase;
 
-// Structure to hold redirect lists for URLs.  For a redirect chain
-// A -> B -> C, and entry in the map would look like "A => {B -> C}".
-typedef std::map<GURL, scoped_refptr<RefCountedVector<GURL> > > RedirectMap;
-
 // Container for a list of URLs.
 typedef std::vector<GURL> RedirectList;