Select a more appropiate appcache based on the opener or the parent of the new document.

webkit/appcache/appcache_service.cc

Index: webkit/appcache/appcache_service.cc
===================================================================
--- webkit/appcache/appcache_service.cc	(revision 80669)
+++ webkit/appcache/appcache_service.cc	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -73,7 +73,7 @@
   }
 
   virtual void Start() {
-    service_->storage()->FindResponseForMainRequest(url_, this);
+    service_->storage()->FindResponseForMainRequest(url_, GURL(), this);
   }
 
  private: