[OnionSoup] remove content::ServiceWorkerResponse

This CL is the 5th step of the plan below aiming to eliminate the native
struct content::ServiceWorkerResponse defined in
content/common/service_worker/service_worker_types.h.

1st step:
https://chromium-review.googlesource.com/c/chromium/src/+/1134731

2nd step:
https://chromium-review.googlesource.com/c/chromium/src/+/1149706

3rd step:
https://chromium-review.googlesource.com/c/chromium/src/+/1155999

4th step:
https://chromium-review.googlesource.com/c/chromium/src/+/1164848

5th step: (this CL)
- Remove content::ServiceWorkerResponse

Bug=789854

Change-Id: I527f76f79f8614acafd7e414f4c1044d8a7be64e
Reviewed-on: https://chromium-review.googlesource.com/1180738
Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Commit-Queue: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584378}
2 files changed