Linux native notifications: Fix clickable buttons

On Peter's notification generator [1], creating a notification with
"Action" set to alert() and everyting else set to default settings,
notification->clickable() is false when I expected the notification to
be clickable.  This CL always makes notifications clickable regardless
of the clickable() state.

[1] https://tests.peter.sh/notification-generator/

BUG=676220
R=peter@chromium.org
CC=thestig@chromium.org

Change-Id: I326b6fa5b64e8a18aa95ea47dfbcbe5caaaa9bdc
Reviewed-on: https://chromium-review.googlesource.com/748213
Reviewed-by: Peter Beverloo <peter@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513159}
1 file changed