commit 4a7f224d18674c23cae8acdf2bfb3df1edd04851
author David Black <dmblack@google.com> Thu Jan 10 01:59:58 2019
committer Commit Bot <commit-bot@chromium.org> Thu Jan 10 01:59:58 2019
tree 33c0d8dee5e39aa41901398d68f2afd21f2f9710
parent c10789c840712a9bfbf6343c416380fc295bf4bb

Pull AssistantCardElementView out of UiElementContainerView.

This will make it easier to maintain both AssistantCardElementView and
UiElementContainerView moving forward.

Note that this CL also changes AssistantCardElementView to extend from
views::View instead of views::NativeViewHost. Previously, we used
views::NativeViewHost because we needed a reference to the native view
that web contents would paint to for animation purposes. Now, the
native view is exposed through NavigableContents so we don't need to
extend views::NativeViewHost any longer.

Known issues:
- Cards are not currently focusable (existing issue - WIP).
- There seems to be some whitespace added to the bottom of cards when
  the content is scrollable. Not sure what that is about but will
  continue to investigate.

Bug: b:120682808
Change-Id: I55a1e03e01979bbe6f4ca932aa73df1180841cda
Reviewed-on: https://chromium-review.googlesource.com/c/1404314
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Commit-Queue: David Black <dmblack@google.com>
Cr-Commit-Position: refs/heads/master@{#621417}