Revert 113071 - Revert 113047 - Make ExtensionService use ExtensionSet.

chrome/browser/extensions/extension_management_api.cc

Index: chrome/browser/extensions/extension_management_api.cc
===================================================================
--- chrome/browser/extensions/extension_management_api.cc	(revision 113231)
+++ chrome/browser/extensions/extension_management_api.cc	(working copy)
@@ -123,10 +123,10 @@
 }
 
 static void AddExtensionInfo(ListValue* list,
-                             const ExtensionList& extensions,
+                             const ExtensionSet& extensions,
                              bool enabled,
                              ExtensionPrefs* prefs) {
-  for (ExtensionList::const_iterator i = extensions.begin();
+  for (ExtensionSet::const_iterator i = extensions.begin();
        i != extensions.end(); ++i) {
     const Extension& extension = **i;