Make sure resource client is called asynchronously

Certain type of resources must have their clients notified
asynchronously.

BUG=352043

Review URL: https://codereview.chromium.org/231873006

git-svn-id: svn://svn.chromium.org/blink/trunk@171402 bbb929c8-8fbe-4397-9dbb-9b2b20218538