GitLab

This is a reland of 8f34427c

Additional fix:
- Increase a pixel expectation in BoundedLabelTest, which was
  affected by some macOS 10.11-specific font variation.

Original change's description:
> Fixes to get Views versions of message_center_unittests passing on Mac.
>
> This enables the views version of the message_center, in preparation
> for removing the Cocoa implementation.
>
> Fixes:
> - Use an EventGenerator in tests, rather than manually synthesizing
>   events.
> - NotificationInputContainerMD::HandleKeyEvent() now explicitly clears
>   the text input field when handling VKEY_RETURN, as the test expects
>   this.
> - Disabling notifications is no longer handled in
>   NotificationViewMD::ButtonPressed(), since it wasn't the button
>   Listener for the block_all_button_ (the
>   NotificationControlButtonsView is). Disabling is now handled in
>   ToggleInlineSettings() instead.
> - The SlideOut tests are disabled on Mac because the test framework
>   doesn't support synthesizing gesture scroll events.
>
> Bug: 739386
> Change-Id: Id841779233662111f52d491ba78e5315422003b4
> Reviewed-on: https://chromium-review.googlesource.com/c/1341091
> Commit-Queue: Robert Sesek <rsesek@chromium.org>
> Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
> Reviewed-by: Evan Stade <estade@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#609514}

Tbr: estade@chromium.org
Bug: 739386
Change-Id: Id7b6b05f5fa487ebb9caaff18ee8570cf5d4b99d
Reviewed-on: https://chromium-review.googlesource.com/c/1343665Reviewed-by: Robert Sesek <rsesek@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609735}