Move c/c/e/extension_set to top-level extensions/

chrome/browser/background/background_contents_service.cc

Index: chrome/browser/background/background_contents_service.cc
diff --git a/chrome/browser/background/background_contents_service.cc b/chrome/browser/background/background_contents_service.cc
index 4579cbdbaf5272b8f3101f20b655f6ab82d13270..79ba668f1d45523b4fd388f1c7c05fbae7acdac7 100644
--- a/chrome/browser/background/background_contents_service.cc
+++ b/chrome/browser/background/background_contents_service.cc
@@ -585,10 +585,11 @@ void BackgroundContentsService::LoadBackgroundContentsFromDictionary(
 
 void BackgroundContentsService::LoadBackgroundContentsFromManifests(
     Profile* profile) {
-  const ExtensionSet* extensions = extensions::ExtensionSystem::Get(profile)->
-      extension_service()->extensions();
-  ExtensionSet::const_iterator iter = extensions->begin();
-  for (; iter != extensions->end(); ++iter) {
+  const extensions::ExtensionSet* extensions =
+      extensions::ExtensionSystem::Get(profile)->
+          extension_service()->extensions();
+  for (extensions::ExtensionSet::const_iterator iter = extensions->begin();
+       iter != extensions->end(); ++iter) {
     const Extension* extension = iter->get();
     if (extension->is_hosted_app() &&
         BackgroundInfo::HasBackgroundPage(extension)) {