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The test was rewritten in https://crrev.com/c/1111910 and now uses a mock
speech recognizer written in js. The previous mock recognizer was removed
and the test was using the actual speech recognition service.

Bug: 855873
Change-Id: I89a902092ee26c16f3624bd359c0cbf55b74e1d8
Tbr: shend@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1117620Reviewed-by: Adithya Srinivasan <adithyas@chromium.org>
Commit-Queue: Adithya Srinivasan <adithyas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570908}