GitLab

This CL introduces the addition of the bridge that will support
Apple's notification API UNUserNotification.

Fixed a typo in notification_platform_bridge_mac.h

Added a condition that determines which bridge to use in
notification_platform_bridge_mac.mm. As of now if the feature
flag:kNewMacNotificationAPI is set to Enabled, no notifications will
be delivered and the request to send notifications won't be triggered.

Bug: 1127330
Change-Id: Ia673c5e390a05f88da61862d78d57f6fa8510f7a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2404841Reviewed-by: Richard Knoll <knollr@chromium.org>
Commit-Queue: Mohamed Adel <adelm@google.com>
Cr-Commit-Position: refs/heads/master@{#806212}