Use Mojo Permission Service when requesting Notifications permission.

content/shell/browser/layout_test/layout_test_content_browser_client.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/shell/browser/layout_test/layout_test_content_browser_client.h"
 
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/shell/browser/layout_test/layout_test_message_filter.h"
 #include "content/shell/browser/layout_test/layout_test_notification_manager.h"
 #include "content/shell/browser/shell_browser_context.h"
 #include "content/shell/common/shell_messages.h"
 #include "content/shell/common/webkit_test_helpers.h"
 
 namespace content {
 namespace {
 
 LayoutTestContentBrowserClient* g_layout_test_browser_client;
 
 void RequestDesktopNotificationPermissionOnIO(
     const GURL& source_origin,
     const base::Callback<void(bool)>& callback) {
   LayoutTestNotificationManager* manager =
       LayoutTestContentBrowserClient::Get()->GetLayoutTestNotificationManager();
-  if (manager)
-    manager->RequestPermission(source_origin, callback);
-  else
-    callback.Run(true);
+  bool allowed = manager ? manager->RequestPermission(source_origin)
+                         : true;
+
+  // The callback came from the UI thread, we need to run it from there again.
+  BrowserThread::PostTask(
+      BrowserThread::UI,
+      FROM_HERE,
+      base::Bind(callback, allowed));
 }
 
 }  // namespace
 
 LayoutTestContentBrowserClient::LayoutTestContentBrowserClient() {
   DCHECK(!g_layout_test_browser_client);
 
   layout_test_notification_manager_.reset(
       new LayoutTestNotificationManager());
 
@@ skipping 69 matching lines @@
     const ShowDesktopNotificationHostMsgParams& params,
     BrowserContext* browser_context,
     int render_process_id,
     scoped_ptr<DesktopNotificationDelegate> delegate,
     base::Closure* cancel_callback) {
   if (auto* manager = GetLayoutTestNotificationManager())
     manager->Show(params, delegate.Pass(), cancel_callback);
 }
 
 }  // namespace content