Revert "[test] Initial import of an emscripten test suite."

Revert "[test] Initial import of an emscripten test suite."

This reverts commit bb346227dbff1a2281032878b21d4a4164d87480 because it
adds a lot of overhead without significantly increasing our test
coverage. We need a different approach to deal with this.

TBR=machenbach@chromium.org

Committed: https://crrev.com/f68e24ad46560bcf210c32ed912de72d55471006
Cr-Commit-Position: refs/heads/master@{#27987}

[commit-bot: I haz the power, 2015-04-22 13:18:53]

Patchset 1 (id:??) landed as
https://crrev.com/f68e24ad46560bcf210c32ed912de72d55471006
Cr-Commit-Position: refs/heads/master@{#27987}