Hoist TrimHttpPrefix() so we only have one copy, not one per provider....

chrome/browser/autocomplete/history_contents_provider.h

Index: chrome/browser/autocomplete/history_contents_provider.h
===================================================================
--- chrome/browser/autocomplete/history_contents_provider.h	(revision 17014)
+++ chrome/browser/autocomplete/history_contents_provider.h	(working copy)
@@ -80,6 +80,9 @@
   // Current autocomplete input type.
   AutocompleteInput::Type input_type_;
 
+  // Whether we should trim "http://" from results.
+  bool trim_http_;
+
   // Results from most recent query. These are cached so we don't have to
   // re-issue queries for "minor changes" (which don't affect this provider).
   history::QueryResults results_;