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The original usage of the method was added to fix a rendering issue
with the YouTube plugin: see http://crrev.com/2862031 .
Setting an appropriate viewport seems to work as well
and removes usage of a method I'm trying to remove.

BUG=417221

Review URL: https://codereview.chromium.org/596253002

Cr-Commit-Position: refs/heads/master@{#296440}