Implement "scope" Web Manifest parsing

content/public/common/manifest.cc

 // Copyright 2014 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.
 
 #include "content/public/common/manifest.h"
 
 namespace content {
 
 // We need to provide a value here which is out of the range of a 32-bit integer
 // since otherwise we would not be able to check whether a theme color was valid
@@ skipping 33 matching lines @@
   return name.is_null() &&
          short_name.is_null() &&
          start_url.is_empty() &&
          display == blink::WebDisplayModeUndefined &&
          orientation == blink::WebScreenOrientationLockDefault &&
          icons.empty() &&
          related_applications.empty() &&
          !prefer_related_applications &&
          theme_color == Manifest::kInvalidOrMissingColor &&
          background_color == Manifest::kInvalidOrMissingColor &&
-         gcm_sender_id.is_null();
+         gcm_sender_id.is_null() &&
+         scope.is_empty();
 }
 
 } // namespace content