Fix an issue that opening a download with remapped MIME type will launch an intent

Fix an issue that opening a download with remapped MIME type will launch an intent

When a download's MIME type is remapped, Chrome should use the new MIME
type.
However, when opening a download from download home, GUID is used to
find the download.
The download history stores the original MIME type, which is not
remapped.
This causes Chrome to incorrectly launch an intent even if the type is
supported.

BUG=657594
Committed: https://crrev.com/1ff89f652baf6e0397c946d76371a04fdda754a0
Cr-Commit-Position: refs/heads/master@{#427205}

[qinmin, 2016-10-20 22:40:56]

qinmin@chromium.org changed reviewers:
+ dfalcantara@chromium.org

[qinmin, 2016-10-20 22:40:56]

PTAL

[gone, 2016-10-24 17:30:45]

lgtm

[qinmin, 2016-10-24 17:33:39]

The CQ bit was checked by qinmin@chromium.org

[commit-bot: I haz the power, 2016-10-24 17:34:09]

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, 2016-10-24 21:04:28]

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

[commit-bot: I haz the power, 2016-10-24 21:04:29]

Try jobs failed on following builders:
  android_clang_dbg_recipe on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/android_clan...)

[qinmin, 2016-10-24 22:07:50]

The CQ bit was checked by qinmin@chromium.org

[commit-bot: I haz the power, 2016-10-24 22:08:29]

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, 2016-10-25 01:10:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-25 01:13:44]

Description was changed from

==========
Fix an issue that opening a download with remapped MIME type will launch an
intent

When a download's MIME type is remapped, Chrome should use the new MIME
type.
However, when opening a download from download home, GUID is used to
find the download.
The download history stores the original MIME type, which is not
remapped.
This causes Chrome to incorrectly launch an intent even if the type is
supported.

BUG=657594
==========

to

==========
Fix an issue that opening a download with remapped MIME type will launch an
intent

When a download's MIME type is remapped, Chrome should use the new MIME
type.
However, when opening a download from download home, GUID is used to
find the download.
The download history stores the original MIME type, which is not
remapped.
This causes Chrome to incorrectly launch an intent even if the type is
supported.

BUG=657594

Committed: https://crrev.com/1ff89f652baf6e0397c946d76371a04fdda754a0
Cr-Commit-Position: refs/heads/master@{#427205}
==========

[commit-bot: I haz the power, 2016-10-25 01:13:45]

Patchset 1 (id:??) landed as
https://crrev.com/1ff89f652baf6e0397c946d76371a04fdda754a0
Cr-Commit-Position: refs/heads/master@{#427205}