M55: Revert r414590

M55: Revert r414590

Fixed the behaviour of form submit to match the standard: no submit is
taken place when the form is detached from the document (e.g., form is
removed).

Reason for revert:

Broke Cloud Print print job upload form.

BUG=586749, 653692
TBR=lunalu@chromium.org,tkent@chromium.org,jwd@chromium.org,iclelland@chromium.org
Original code review: https://codereview.chromium.org/2261393002

Review-Url: https://codereview.chromium.org/2409863002
Cr-Commit-Position: refs/heads/master@{#424328}
(cherry picked from commit 005750463baa9ec11ff139b5256f78eec8e6510f)

Committed: https://chromium.googlesource.com/chromium/src/+/94272796d09c2055db4d1ff48de2258fb9c608d0

[Lei Zhang, 2016-10-12 18:43:23]

Description was changed from

==========
M55: Revert r414590

Fixed the behaviour of form submit to match the standard: no submit is
taken place when the form is detached from the document (e.g., form is
removed).

Reason for revert:

Broke Cloud Print print job upload form.

BUG=586749,653692
TBR=lunalu@chromium.org,tkent@chromium.org,jwd@chromium.org,iclelland@chromiu...
Original code review: https://codereview.chromium.org/2261393002

Review-Url: https://codereview.chromium.org/2409863002
Cr-Commit-Position: refs/heads/master@{#424328}
(cherry picked from commit 005750463baa9ec11ff139b5256f78eec8e6510f)
==========

to

==========
M55: Revert r414590

Fixed the behaviour of form submit to match the standard: no submit is
taken place when the form is detached from the document (e.g., form is
removed).

Reason for revert:

Broke Cloud Print print job upload form.

BUG=586749,653692
TBR=lunalu@chromium.org,tkent@chromium.org,jwd@chromium.org,iclelland@chromiu...
Original code review: https://codereview.chromium.org/2261393002

Review-Url: https://codereview.chromium.org/2409863002
Cr-Commit-Position: refs/heads/master@{#424328}
(cherry picked from commit 005750463baa9ec11ff139b5256f78eec8e6510f)

Committed:
https://chromium.googlesource.com/chromium/src/+/94272796d09c2055db4d1ff48de2...
==========

[Lei Zhang, 2016-10-12 18:43:25]

Committed patchset #1 (id:1) manually as
94272796d09c2055db4d1ff48de2258fb9c608d0.

[tkent, 2016-10-12 22:54:12]

lgtm