Revert changes to download_prefs regarding PDF auto open.

Revert changes to download_prefs regarding PDF auto open.

In https://codereview.chromium.org/2369353002/ we introduced logic
to automatically open the program associated with PDF when the
always open PDF in external viewer was selected. This causes some
issues where saving of PDFs becomes harder or cumbersome.

Until we figre better way to decided when to auto-open and when not
revert this logic.

BUG=680202
TEST=This is revert to existing state covered by existing tests.

Review-Url: https://codereview.chromium.org/2669773002
Cr-Commit-Position: refs/heads/master@{#447773}
(cherry picked from commit 7c93dbe0d5fe53372321fa53368377ee6770405a)

Review-Url: https://codereview.chromium.org/2683543002 .
Cr-Commit-Position: refs/branch-heads/2987@{#356}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/58f25776d2ee7cacc0a3d0a6a9be90184d944adf

[pastarmovj, 2017-02-07 07:39:25]

Description was changed from

==========
Revert changes to download_prefs regarding PDF auto open.

In https://codereview.chromium.org/2369353002/ we introduced logic
to automatically open the program associated with PDF when the
always open PDF in external viewer was selected. This causes some
issues where saving of PDFs becomes harder or cumbersome.

Until we figre better way to decided when to auto-open and when not
revert this logic.

BUG=680202
TEST=This is revert to existing state covered by existing tests.

Review-Url: https://codereview.chromium.org/2669773002
Cr-Commit-Position: refs/heads/master@{#447773}
(cherry picked from commit 7c93dbe0d5fe53372321fa53368377ee6770405a)
==========

to

==========
Revert changes to download_prefs regarding PDF auto open.

In https://codereview.chromium.org/2369353002/ we introduced logic
to automatically open the program associated with PDF when the
always open PDF in external viewer was selected. This causes some
issues where saving of PDFs becomes harder or cumbersome.

Until we figre better way to decided when to auto-open and when not
revert this logic.

BUG=680202
TEST=This is revert to existing state covered by existing tests.

Review-Url: https://codereview.chromium.org/2669773002
Cr-Commit-Position: refs/heads/master@{#447773}
(cherry picked from commit 7c93dbe0d5fe53372321fa53368377ee6770405a)

Review-Url: https://codereview.chromium.org/2683543002 .
Cr-Commit-Position: refs/branch-heads/2987@{#356}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/58f25776d2ee7cacc0a3d0a6a9be...
==========

[pastarmovj, 2017-02-07 07:39:27]

Committed patchset #1 (id:1) manually as
58f25776d2ee7cacc0a3d0a6a9be90184d944adf (tree was closed).