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The API on action_runner to run JavaScript now supports safe and simple
interpolation of values into code templates. This CL fixes and cleans
up many of the callers which weren't using robust methods for quoting
such values.

BUG=catapult:#3028

Review-Url: https://codereview.chromium.org/2618333006
Cr-Commit-Position: refs/heads/master@{#443194}