[Fetch API] Unify stream-reader test expectations.

[Fetch API] Unify stream-reader test expectations.

http/tests/fetch/*/stream-reader*.html fail on Windows or Mac. This CL
unifies cluttered test expectations about these tests.

BUG=472970
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=194804

[yhirano, 2015-05-01 06:52:38]

yhirano@chromium.org changed reviewers:
+ hiroshige@chromium.org

[yhirano, 2015-05-01 06:52:38]

yhirano@chromium.org changed reviewers:
+ hiroshige@chromium.org

[yhirano, 2015-05-01 06:52:56]

The CQ bit was checked by yhirano@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-05-01 06:53:10]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1120653005/1

[yhirano, 2015-05-01 07:09:14]

The CQ bit was checked by yhirano@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-05-01 07:09:21]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1120653005/20001

[hiroshige, 2015-05-01 08:00:00]

lgtm, but in this case FAILURE and TIMEOUT seems to have different root causes
and merging might be confusing?
I think better to do cleanup somehow later.

[commit-bot: I haz the power, 2015-05-01 08:15:06]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-05-01 08:15:07]

Dry run: This issue passed the CQ dry run.

[yhirano, 2015-05-01 12:44:03]

The CQ bit was checked by yhirano@chromium.org

[commit-bot: I haz the power, 2015-05-01 12:44:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1120653005/20001

[commit-bot: I haz the power, 2015-05-01 12:44:49]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=194804