[Notifications] Fix swipe to close for ARC notifications.

[Notifications] Fix swipe to close for ARC notifications.

Change ArcCustomNotificationView::EventForwarder to not directly invoke On*Event methods of ArcCustomNotificationView (which then call up to the parent). Instead, re-dispatch them to the containing widget, which should handle the event propagation, letting SlideOutController get events as it should. A consequence of this is that I had to add a delegate method to SlideOutController to update ArcCustomNotificationView::SlideHelper. This is because ArcCustomNotificationView will no longer get the gesture events, since it is no longer being called directly from EventForwarder.

BUG=719407
Review-Url: https://codereview.chromium.org/2873553002
Cr-Commit-Position: refs/heads/master@{#473094}
(cherry picked from commit 870290f623b47e436d231e354c84b8723bb7000a)

Review-Url: https://codereview.chromium.org/2897903002 .
Cr-Commit-Position: refs/branch-heads/3071@{#647}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/e33f895d0e3263a25c8e7cd114bfb793ea99fe83

[yoshiki, 2017-05-22 05:52:34]

Description was changed from

==========
[Notifications] Fix swipe to close for ARC notifications.

Change ArcCustomNotificationView::EventForwarder to not directly invoke On*Event
methods of ArcCustomNotificationView (which then call up to the parent).
Instead, re-dispatch them to the containing widget, which should handle the
event propagation, letting SlideOutController get events as it should. A
consequence of this is that I had to add a delegate method to SlideOutController
to update ArcCustomNotificationView::SlideHelper. This is because
ArcCustomNotificationView will no longer get the gesture events, since it is no
longer being called directly from EventForwarder.

BUG=719407

Review-Url: https://codereview.chromium.org/2873553002
Cr-Commit-Position: refs/heads/master@{#473094}
(cherry picked from commit 870290f623b47e436d231e354c84b8723bb7000a)
==========

to

==========
[Notifications] Fix swipe to close for ARC notifications.

Change ArcCustomNotificationView::EventForwarder to not directly invoke On*Event
methods of ArcCustomNotificationView (which then call up to the parent).
Instead, re-dispatch them to the containing widget, which should handle the
event propagation, letting SlideOutController get events as it should. A
consequence of this is that I had to add a delegate method to SlideOutController
to update ArcCustomNotificationView::SlideHelper. This is because
ArcCustomNotificationView will no longer get the gesture events, since it is no
longer being called directly from EventForwarder.

BUG=719407

Review-Url: https://codereview.chromium.org/2873553002
Cr-Commit-Position: refs/heads/master@{#473094}
(cherry picked from commit 870290f623b47e436d231e354c84b8723bb7000a)

Review-Url: https://codereview.chromium.org/2897903002 .
Cr-Commit-Position: refs/branch-heads/3071@{#647}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/e33f895d0e3263a25c8e7cd114bf...
==========

[yoshiki, 2017-05-22 05:52:36]

Committed patchset #1 (id:1) manually as
e33f895d0e3263a25c8e7cd114bfb793ea99fe83.