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This allows us to query version information (e.g. the build version,
whether it's an offical build) whether or not the native library is
loaded.

Future work: put channel information in this file too, and delete the
ChromeVersionInfo.init() method.

TBR=mmenke@chromium.org

Review URL: https://codereview.chromium.org/623403002

Cr-Commit-Position: refs/heads/master@{#299195}