Revert "Handle direction control in compositor Animations"

This reverts: https://src.chromium.org/viewvc/blink?revision=170491&view=revision

Failed attempt to land two-sided patch. The chromium side broke the blink build and then this patch further broke it after the chromium side was reverted.

In the future, please do a three-step commit if that's required to ensure no build breakage.

TBR=a.renevier@samsung.com
BUG=348071

Review URL: https://codereview.chromium.org/220503002

git-svn-id: svn://svn.chromium.org/blink/trunk@170503 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Let MediaController.currentTime return the position previously set

BUG=358226

Review URL: https://codereview.chromium.org/219523004

git-svn-id: svn://svn.chromium.org/blink/trunk@170504 bbb929c8-8fbe-4397-9dbb-9b2b20218538