Add menu option for disabling app notifications

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 0a8196db35f0baac222c48ba97c4e6eef29a7219..95f3ad5efba7cf6c5cbd112e02c6591bf463c1de 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -1444,6 +1444,11 @@ void ExtensionService::ProcessExtensionSyncData(
       bundle.pending_sync_data[extension_sync_data.id()] = extension_sync_data;
       CheckForUpdatesSoon();
     }
+    if (extension_sync_data.notifications_disabled() !=
+        extension_prefs_->IsAppNotificationDisabled(id)) {
+      extension_prefs_->SetAppNotificationDisabled(
+          id, extension_sync_data.notifications_disabled());
+    }
   } else {
     // TODO(akalin): Replace silent update with a list of enabled
     // permissions.