Add back captureEvents and releaseEvents

The main reason for adding this back is that it breaks a bunch of web
sites. Another data point is that IE11 added it.

This reverts commit 4c3ee987eadbaef48c3e514908d94cad9a0f8c1b.

This also adds deprecatation warnings when calling these methods.

BUG=238243
R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/21263002

git-svn-id: svn://svn.chromium.org/blink/trunk@155172 bbb929c8-8fbe-4397-9dbb-9b2b20218538