Fix an issue that download may missing MIME type if it failed ealier

Fix an issue that download may missing MIME type if it failed ealier

If a download fails before response is started, it will not have MIME type set.
Later when resuming the download, Chrome should reset the MIME type when it becomes available.

BUG=683084
Review-Url: https://codereview.chromium.org/2653833002
Cr-Commit-Position: refs/heads/master@{#446756}
Committed: https://chromium.googlesource.com/chromium/src/+/521884b60a3ecb3b6ca5081b1e36244c2877e279

[qinmin, 2017-01-24 00:26:12]

qinmin@chromium.org changed reviewers:
+ asanka@chromium.org, dtrainor@chromium.org

[qinmin, 2017-01-24 00:26:13]

PTAL

[David Trainor- moved to gerrit, 2017-01-24 16:59:44]

lgtm!

[asanka, 2017-01-27 01:42:41]

lgtm

[qinmin, 2017-01-27 07:03:05]

The CQ bit was checked by qinmin@chromium.org

[commit-bot: I haz the power, 2017-01-27 07:03:32]

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, 2017-01-27 07:26:16]

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

[commit-bot: I haz the power, 2017-01-27 07:26:17]

Try jobs failed on following builders:
  linux_chromium_chromeos_ozone_rel_ng on master.tryserver.chromium.linux
(JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[qinmin, 2017-01-27 19:25:58]

The CQ bit was checked by qinmin@chromium.org

[qinmin, 2017-01-27 19:25:59]

The patchset sent to the CQ was uploaded after l-g-t-m from asanka@chromium.org,
dtrainor@chromium.org
Link to the patchset: https://codereview.chromium.org/2653833002/#ps20001
(title: "fix DCHECK")

[commit-bot: I haz the power, 2017-01-27 19:26:54]

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, 2017-01-27 20:41:03]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1485545158817530,
"parent_rev": "26ddde696e8a0076fed1b3f402d5f20009be16b2", "commit_rev":
"521884b60a3ecb3b6ca5081b1e36244c2877e279"}

[commit-bot: I haz the power, 2017-01-27 20:41:35]

Description was changed from

==========
Fix an issue that download may missing MIME type if it failed ealier

If a download fails before response is started, it will not have MIME type set.
Later when resuming the download, Chrome should reset the MIME type when it
becomes available.

BUG=683084
==========

to

==========
Fix an issue that download may missing MIME type if it failed ealier

If a download fails before response is started, it will not have MIME type set.
Later when resuming the download, Chrome should reset the MIME type when it
becomes available.

BUG=683084

Review-Url: https://codereview.chromium.org/2653833002
Cr-Commit-Position: refs/heads/master@{#446756}
Committed:
https://chromium.googlesource.com/chromium/src/+/521884b60a3ecb3b6ca5081b1e36...
==========

[commit-bot: I haz the power, 2017-01-27 20:41:37]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/521884b60a3ecb3b6ca5081b1e36...