GitLab

This CL adds support for presenting the password infobar modal UI via
the banner interaction handler.  In order to accomplish this, the
InfobarOverlayRequestInserter was converted into a WebStateUserData so
that it can be accessed from OverlayRequest callbacks.  Additionally,
this CL updates InfobarOverlayRequestFactoryImpl to add a factory that
creates requests for modal UI.

If an infobar is replaced while modal UI is displayed, modal UI for the
replacement infobar should not immediately be shown; it needs to be
accessed via interaction with the infobar banner or the badge.  In order
to implement this behavior, InfobarOverlayRequestCancelHandler was
refactored to be a superclass that does not perform any request
replacement logic.  The replacement logic is now moved to a banner-
specific subclass that will show the replacement infobar's banner if
the banner for the replaced infobar is visible.

Bug: 1030357
Change-Id: I085110b8198029584fd94b8b55427d2e41e07bf5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2003258
Commit-Queue: Kurt Horimoto <kkhorimoto@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737170}