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This CL adds testing for the Alamrs API with Service Worker-
based extensions through parameterized test fixtures.

Bug: 1093066
Change-Id: I86b576d50ec2786c0b042550878141e350d9059d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2250638Reviewed-by: Archana Simha <archanasimha@chromium.org>
Commit-Queue: David Bertoni <dbertoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#779503}