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This CL does two things;

 * Makes the commit requested test explicitly check that
   a commit only occurs during the impl frame.

 * Adds check for the case where commit is requested by
   can't draw.

This test was extracted from my original CL at
https://codereview.chromium.org/792803008/

BUG=346230

Review URL: https://codereview.chromium.org/1055673005

Cr-Commit-Position: refs/heads/master@{#324215}