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

chrome/browser/ui/browser_browsertest.cc

Index: chrome/browser/ui/browser_browsertest.cc
diff --git a/chrome/browser/ui/browser_browsertest.cc b/chrome/browser/ui/browser_browsertest.cc
index 618de843c69bcc1fbed58db9a9218d2d79d1989d..3fc71b76b3ef2e9420f606c013df0fe0fdf553a2 100644
--- a/chrome/browser/ui/browser_browsertest.cc
+++ b/chrome/browser/ui/browser_browsertest.cc
@@ -351,9 +351,10 @@ class BrowserTest : public ExtensionBrowserTest {
 
   // Returns the app extension aptly named "App Test".
   const Extension* GetExtension() {
-    const ExtensionSet* extensions = extensions::ExtensionSystem::Get(
-        browser()->profile())->extension_service()->extensions();
-    for (ExtensionSet::const_iterator it = extensions->begin();
+    const extensions::ExtensionSet* extensions =
+        extensions::ExtensionSystem::Get(
+            browser()->profile())->extension_service()->extensions();
+    for (extensions::ExtensionSet::const_iterator it = extensions->begin();
          it != extensions->end(); ++it) {
       if ((*it)->name() == "App Test")
         return it->get();