Group the different permission related methods in the content api.

content/shell/browser/layout_test/layout_test_notification_manager.cc

Index: content/shell/browser/layout_test/layout_test_notification_manager.cc
diff --git a/content/shell/browser/layout_test/layout_test_notification_manager.cc b/content/shell/browser/layout_test/layout_test_notification_manager.cc
index b3f64b471bd1760a91999686d5a6022d4b902a0a..7366aabcd8f242d08132b18e17f63463a4bd0783 100644
--- a/content/shell/browser/layout_test/layout_test_notification_manager.cc
+++ b/content/shell/browser/layout_test/layout_test_notification_manager.cc
@@ -29,9 +29,10 @@ LayoutTestNotificationManager::CheckPermission(const GURL& origin) {
 
 void LayoutTestNotificationManager::RequestPermission(
     const GURL& origin,
-    const base::Callback<void(blink::WebNotificationPermission)>& callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  callback.Run(CheckPermission(origin));
+    const base::Callback<void(bool)>& callback) {
+  bool allowed =
+      CheckPermission(origin) == blink::WebNotificationPermissionAllowed;
+  callback.Run(allowed);
 }
 
 void LayoutTestNotificationManager::SetPermission(