bindings: Removes flaky tests about ArrayBuffer.

It turned out that the bindings tests that I added in http://crrev.com/606653006
are flakey.  Removes(disables) those tests temporarily.  Will add them back once
I fix the cause of the flakiness.

BUG=235436
TBR=haraken@chromium.org

Review URL: https://codereview.chromium.org/647543004

git-svn-id: svn://svn.chromium.org/blink/trunk@184045 bbb929c8-8fbe-4397-9dbb-9b2b20218538