Reject SRI blindly when response is ineligible for validation

We should reject SRI blindly when the response is not eligible for
integrity validation. The logic is correctly implemented in
ResourceLoader but not in FetchManager.

TBR=yhirano@chromium.org

(cherry picked from commit c7bfc96d2c218e8b1592d379da1fe256767cdf27)

Bug: 812667
Change-Id: If0c29e2e541a1bb3edb09a72fbba3ae55c134303
Reviewed-on: https://chromium-review.googlesource.com/948229
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#541092}
Reviewed-on: https://chromium-review.googlesource.com/1004977
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/branch-heads/3359@{#677}
Cr-Branched-From: 66afc5e5d10127546cc4b98b9117aff588b5e66b-refs/heads/master@{#540276}
2 files changed