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.

TBR=dfalcantara@chromium.org
BUG=657594
Review-Url: https://codereview.chromium.org/2437243002
Cr-Commit-Position: refs/heads/master@{#427205}
(cherry picked from commit 1ff89f652baf6e0397c946d76371a04fdda754a0)

Committed: https://chromium.googlesource.com/chromium/src/+/dbc136f566c97a2f75aff133b537d1c52fae148b

[qinmin, 2016-10-25 18:23:48]

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.

TBR=dfalcantara@chromium.org
BUG=657594

Review-Url: https://codereview.chromium.org/2437243002
Cr-Commit-Position: refs/heads/master@{#427205}
(cherry picked from commit 1ff89f652baf6e0397c946d76371a04fdda754a0)
==========

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.

TBR=dfalcantara@chromium.org
BUG=657594

Review-Url: https://codereview.chromium.org/2437243002
Cr-Commit-Position: refs/heads/master@{#427205}
(cherry picked from commit 1ff89f652baf6e0397c946d76371a04fdda754a0)

Committed:
https://chromium.googlesource.com/chromium/src/+/dbc136f566c97a2f75aff133b537...
==========

[qinmin, 2016-10-25 18:23:49]

Committed patchset #1 (id:1) manually as
dbc136f566c97a2f75aff133b537d1c52fae148b (presubmit successful).