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This change uses AllResponsesConsumed in the bluetooth Web Platform
Tests in order to make sure we have consumed all the anticipatory
responses that we've set on our fakes.

BUG=569709

Change-Id: I9767792fcd5dda71fabf2f8941638f744aefa2dc
Reviewed-on: https://chromium-review.googlesource.com/988422
Commit-Queue: Conley Owens <cco3@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548125}