GitLab

https://chromium-review.googlesource.com/c/chromium/src/+/1631124
already made WebServiceWorkerStreamHandle used only inside Blink, this
CL removes it.

BUG=922376,879019

Change-Id: Ia9cd4f3cef9354ba64e492d3372b25ae626b64d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1634382Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Commit-Queue: Leon Han <leon.han@intel.com>
Cr-Commit-Position: refs/heads/master@{#664737}