[Cronet] Mark request as complete when OutputStream fails

[Cronet] Mark request as complete when OutputStream fails

When consumer specifies a chunked upload or a fixed stream upload, Cronet's
HttpURLConnection starts the request right away. If an error happens, we will
surface that error as an IOException to consumer. However, if the consumer
tries to call any other API (like getResponseCode(), getResponseMessage())
afterwards, we will spin up the message loop and wait forever.

This CL marks the request as complete if an error occurred in upload, so
getResponseCode() etc. do not spin up the message loop to wait for response.

TBR=pauljensen@chromium.org

NOTRY=true
NOPRESUBMIT=true

BUG=630664
Review-Url: https://codereview.chromium.org/2173923002
Cr-Commit-Position: refs/heads/master@{#407468}
(cherry picked from commit 7fbfe4fe8ff451d1f65ac574a2304d383aaeec16)

[xunjieli, 2016-07-25 18:02:27]

Paul, I am TBR-ing you. I will CQ it once I confirm that Cronet tests are still
passing. Thank you!

[xunjieli, 2016-07-25 18:28:16]

On 2016/07/25 18:02:27, xunjieli wrote:
> Paul, I am TBR-ing you. I will CQ it once I confirm that Cronet tests are
still
> passing. Thank you!

Cronet compiles and tests passed. Thanks!

[xunjieli, 2016-07-25 18:28:21]

The CQ bit was checked by xunjieli@chromium.org

[commit-bot: I haz the power, 2016-07-25 18:29:03]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-25 18:33:33]

Committed patchset #1 (id:1)