Fix nits in content/browser/appcache/

content/browser/appcache/appcache_group.h

Index: content/browser/appcache/appcache_group.h
diff --git a/content/browser/appcache/appcache_group.h b/content/browser/appcache/appcache_group.h
index c79318fd7edb40139ed4f7eef9c12e9f653a902a..3c54cfec5a2bf70504b24718f9595e0459caf31d 100644
--- a/content/browser/appcache/appcache_group.h
+++ b/content/browser/appcache/appcache_group.h
@@ -23,17 +23,13 @@ FORWARD_DECLARE_TEST(AppCacheGroupTest, CancelUpdate);
 FORWARD_DECLARE_TEST(AppCacheGroupTest, QueueUpdate);
 FORWARD_DECLARE_TEST(AppCacheUpdateJobTest, AlreadyChecking);
 FORWARD_DECLARE_TEST(AppCacheUpdateJobTest, AlreadyDownloading);
-class AppCacheUpdateJobTest;
-class MockAppCacheStorage;
-}
-
-namespace content {
-
 class AppCache;
 class AppCacheHost;
 class AppCacheStorage;
 class AppCacheUpdateJob;
+class AppCacheUpdateJobTest;
 class HostObserver;
+class MockAppCacheStorage;
 
 // Collection of application caches identified by the same manifest URL.
 // A group exists as long as it is in use by a host or is being updated.