Add signed exchange reporting error test cases

Bug: 910516
Change-Id: I01f776e0a787e97430cc033d55bb1a32e900f9e9
Reviewed-on: https://chromium-review.googlesource.com/c/1480363
Commit-Queue: Tsuyoshi Horo <horo@chromium.org>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#634520}
41 files changed