Revert 113071 - Revert 113047 - Make ExtensionService use ExtensionSet.

chrome/browser/intents/web_intents_registry.cc

Index: chrome/browser/intents/web_intents_registry.cc
===================================================================
--- chrome/browser/intents/web_intents_registry.cc	(revision 113231)
+++ chrome/browser/intents/web_intents_registry.cc	(working copy)
@@ -81,9 +81,9 @@
 
   // Loop over all intents in all extensions, collect ones matching the query.
   if (extension_service_) {
-    const ExtensionList* extensions = extension_service_->extensions();
+    const ExtensionSet* extensions = extension_service_->extensions();
     if (extensions) {
-      for (ExtensionList::const_iterator i(extensions->begin());
+      for (ExtensionSet::const_iterator i(extensions->begin());
            i != extensions->end(); ++i) {
         const IntentServiceList& intents((*i)->intents_services());
         for (IntentServiceList::const_iterator j(intents.begin());