Added ui::test::MultiLayerAnimatorTestController and Delegate.

Added ui::test::MultiLayerAnimatorTestController and Delegate.

Extracted re-useable code from the views::test::InkDropAnimationTestApi
so that it can be reused by the views::test::InkDropHoverTestApi.

BUG=604415
Review URL: https://codereview.chromium.org/1900283002

Cr-Commit-Position: refs/heads/master@{#388387}
(cherry picked from commit c582d1c3358e0302f997f926a0dc35c97b76f827)

Committed: https://chromium.googlesource.com/chromium/src/+/2c5a705a454de5ac1298493ca3327ca740c6feac

[bruthig, 2016-05-03 14:40:50]

Description was changed from

==========
Added ui::test::MultiLayerAnimatorTestController and Delegate.

Extracted re-useable code from the views::test::InkDropAnimationTestApi
so that it can be reused by the views::test::InkDropHoverTestApi.

BUG=604415

Review URL: https://codereview.chromium.org/1900283002

Cr-Commit-Position: refs/heads/master@{#388387}
(cherry picked from commit c582d1c3358e0302f997f926a0dc35c97b76f827)
==========

to

==========
Added ui::test::MultiLayerAnimatorTestController and Delegate.

Extracted re-useable code from the views::test::InkDropAnimationTestApi
so that it can be reused by the views::test::InkDropHoverTestApi.

BUG=604415

Review URL: https://codereview.chromium.org/1900283002

Cr-Commit-Position: refs/heads/master@{#388387}
(cherry picked from commit c582d1c3358e0302f997f926a0dc35c97b76f827)

Committed:
https://chromium.googlesource.com/chromium/src/+/2c5a705a454de5ac1298493ca332...
==========

[bruthig, 2016-05-03 14:40:52]

Committed patchset #1 (id:1) manually as
2c5a705a454de5ac1298493ca3327ca740c6feac.