Use native implementation of dangerous download infobar

Use native implementation of dangerous download infobar

Currently the dangerous download infobar is implemented in java.
This is because some of the download is intercepted by
Android DownloadManager previously.
When all the download are handled by native, we should use native
infobar implementation.
The only exception is OMA DRM download, but those files are not
considered dangerous.

TBR=dfalcantara@chromium.org
BUG=654048
Review-Url: https://codereview.chromium.org/2437623003
Cr-Commit-Position: refs/heads/master@{#427428}
(cherry picked from commit ad5764a975c7b084009ba19ed7c95a393b8b3b23)

Committed: https://chromium.googlesource.com/chromium/src/+/b7620c145dcabaef1925b113a46637fcdc30cb4f

[qinmin, 2016-11-11 18:38:38]

Description was changed from

==========
Use native implementation of dangerous download infobar

Currently the dangerous download infobar is implemented in java.
This is because some of the download is intercepted by
Android DownloadManager previously.
When all the download are handled by native, we should use native
infobar implementation.
The only exception is OMA DRM download, but those files are not
considered dangerous.

TBR=dfalcantara@chromium.org
BUG=654048

Review-Url: https://codereview.chromium.org/2437623003
Cr-Commit-Position: refs/heads/master@{#427428}
(cherry picked from commit ad5764a975c7b084009ba19ed7c95a393b8b3b23)
==========

to

==========
Use native implementation of dangerous download infobar

Currently the dangerous download infobar is implemented in java.
This is because some of the download is intercepted by
Android DownloadManager previously.
When all the download are handled by native, we should use native
infobar implementation.
The only exception is OMA DRM download, but those files are not
considered dangerous.

TBR=dfalcantara@chromium.org
BUG=654048

Review-Url: https://codereview.chromium.org/2437623003
Cr-Commit-Position: refs/heads/master@{#427428}
(cherry picked from commit ad5764a975c7b084009ba19ed7c95a393b8b3b23)

Committed:
https://chromium.googlesource.com/chromium/src/+/b7620c145dcabaef1925b113a466...
==========

[qinmin, 2016-11-11 18:38:39]

Committed patchset #1 (id:1) manually as
b7620c145dcabaef1925b113a46637fcdc30cb4f (presubmit successful).