Catches and ignores errors when accessing win.document in Password Autofill JS

Catches and ignores errors when accessing win.document in Password Autofill JS

Old implementation assumes that win.document will silently return nil.
Under some versions of iOS, access to win.document may generate an
exception, thus the try/catch.

BUG=685761
Review-Url: https://codereview.chromium.org/2661503003
Cr-Commit-Position: refs/heads/master@{#447228}
(cherry picked from commit ea5098bb3372baa8d32b117f1b687e739e075988)

Review-Url: https://codereview.chromium.org/2677703002 .
Cr-Commit-Position: refs/branch-heads/2987@{#293}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/afa15792ff95c1cd79b83115198bd5e4be74ab2d

[Eugene But (OOO till 7-30), 2017-02-03 18:24:35]

Description was changed from

==========
Catches and ignores errors when accessing win.document in Password Autofill JS

Old implementation assumes that win.document will silently return nil.
Under some versions of iOS, access to win.document may generate an
exception, thus the try/catch.

BUG=685761

Review-Url: https://codereview.chromium.org/2661503003
Cr-Commit-Position: refs/heads/master@{#447228}
(cherry picked from commit ea5098bb3372baa8d32b117f1b687e739e075988)
==========

to

==========
Catches and ignores errors when accessing win.document in Password Autofill JS

Old implementation assumes that win.document will silently return nil.
Under some versions of iOS, access to win.document may generate an
exception, thus the try/catch.

BUG=685761

Review-Url: https://codereview.chromium.org/2661503003
Cr-Commit-Position: refs/heads/master@{#447228}
(cherry picked from commit ea5098bb3372baa8d32b117f1b687e739e075988)

Review-Url: https://codereview.chromium.org/2677703002 .
Cr-Commit-Position: refs/branch-heads/2987@{#293}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/afa15792ff95c1cd79b83115198b...
==========

[Eugene But (OOO till 7-30), 2017-02-03 18:24:36]

Committed patchset #1 (id:1) manually as
afa15792ff95c1cd79b83115198bd5e4be74ab2d.