[Cronet] Add tests for native request cancelation during upload.

Bug: 930153
Change-Id: Ic0375059b6a427cc73cff1f703b7d503d7acf031
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1461322
Commit-Queue: Misha Efimov <mef@chromium.org>
Reviewed-by: Paul Jensen <pauljensen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652184}
3 files changed