Use GURLs instead of patterns in SetContentSetting in notification
DesktopNotificationProfileUtil::ClearSetting() is changed to take GURLs directly
which internally call HostContentSettingsMap::SetContentSettingDefaultScope().
For case in MessageCenterSettingsController, since the patterns are from user
input, SetContentSetting() is used instead of ClearSetting() to take patterns
directly.
BUG=
551747
Committed:
https://crrev.com/71deb5f7cacc66ee3c901ac406db75c5f1eb83a4
Cr-Commit-Position: refs/heads/master@{#381608}