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The purpose of this is to continue gathering all the related code together, and to make it easier to run pylint/tests for the main module which still contains most of the code.

After doing this, pylint and the tests caught a couple of things -- one unused variable name, and after the script changed directory, some of the paths had to be modified as well.

BUG=

Review URL: https://codereview.chromium.org/564663002

Cr-Commit-Position: refs/heads/master@{#296847}