Create Private Data for InMemoryURLIndex (in Preparation for SQLite Cache)

chrome/browser/history/history_types.h

Index: chrome/browser/history/history_types.h
===================================================================
--- chrome/browser/history/history_types.h	(revision 106401)
+++ chrome/browser/history/history_types.h	(working copy)
@@ -74,6 +74,7 @@
   URLRow& operator=(const URLRow& other);
 
   URLID id() const { return id_; }
+  void set_id(URLID id) { id_ = id; }

[Peter Kasting, 2011/10/24 22:01:40]

Nit: Given that the comments on |id_| below talk about this being immutable, it
seems like you should both update those comments and add a note here about how
this should be correctly used?

[mrossetti, 2011/10/25 16:15:05]

Done.

   const GURL& url() const { return url_; }
 
   const string16& title() const {