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

chrome/browser/autocomplete/extension_app_provider.cc

Index: chrome/browser/autocomplete/extension_app_provider.cc
diff --git a/chrome/browser/autocomplete/extension_app_provider.cc b/chrome/browser/autocomplete/extension_app_provider.cc
index e51bfbecd91dcd9a7fbdc9c7a0c2c754af769e84..32cbf799b5381a961910e56d62d4abb567dfa3e9 100644
--- a/chrome/browser/autocomplete/extension_app_provider.cc
+++ b/chrome/browser/autocomplete/extension_app_provider.cc
@@ -153,9 +153,9 @@ void ExtensionAppProvider::RefreshAppList() {
       extension_service();
   if (!extension_service)
     return;  // During testing, there is no extension service.
-  const ExtensionSet* extensions = extension_service->extensions();
+  const extensions::ExtensionSet* extensions = extension_service->extensions();
   extension_apps_.clear();
-  for (ExtensionSet::const_iterator iter = extensions->begin();
+  for (extensions::ExtensionSet::const_iterator iter = extensions->begin();
        iter != extensions->end(); ++iter) {
     const extensions::Extension* app = iter->get();
     if (!app->ShouldDisplayInAppLauncher())