Merge "submit() in submit event handler should not contains a value of a submit button." to M54 bra…

Merge "submit() in submit event handler should not contains a value of a submit button." to M54 branch

The value of a submit button is appended to a FormData if its activatedSubmit flag
is set.
In a case of form.submit() is called in submit event handler, we did:

1. Set activatedSubmit flag of the submit button
2. Dispatch submit event
2.1. form.submit() builds FormData
3. Build FormData if the submit event was not prevented
4. Clear activatedSubmit flag of the submit button

In step 2.1, we should not include the submit button. So, this CL changes the
process as follows:

1. Dispatch submit event
1.1 form.submit() builds FormData
2. If the submit event was not prevented,
2.1. Set activatedSubmit flag of the submit button
2.2. Build FormData
2.3. Clear activatedSubmit flag of the submit button

Implementation:
We called setActivatedSubmit() before/after prepareForSubmission(). Instead, we
pass a submit button element to prepareForSubmission(), and call
setActivatedSubmit() just before/after building FormData.

BUG=646790
Review-Url: https://codereview.chromium.org/2340213002
Cr-Commit-Position: refs/heads/master@{#419073}
(cherry picked from commit 864df709bb6b675152537a276723c2d0a8757e48)

Committed: https://chromium.googlesource.com/chromium/src/+/f8be4fbd37d679e362c0eac49098fa913dc51ef3

[tkent, 2016-09-16 11:56:52]

Description was changed from

==========
Merge "submit() in submit event handler should not contains a value of a submit
button." to M54 branch

The value of a submit button is appended to a FormData if its activatedSubmit
flag
is set.
In a case of form.submit() is called in submit event handler, we did:

1. Set activatedSubmit flag of the submit button
2. Dispatch submit event
2.1. form.submit() builds FormData
3. Build FormData if the submit event was not prevented
4. Clear activatedSubmit flag of the submit button

In step 2.1, we should not include the submit button. So, this CL changes the
process as follows:

1. Dispatch submit event
1.1 form.submit() builds FormData
2. If the submit event was not prevented,
2.1. Set activatedSubmit flag of the submit button
2.2. Build FormData
2.3. Clear activatedSubmit flag of the submit button

Implementation:
We called setActivatedSubmit() before/after prepareForSubmission(). Instead, we
pass a submit button element to prepareForSubmission(), and call
setActivatedSubmit() just before/after building FormData.

BUG=646790

Review-Url: https://codereview.chromium.org/2340213002
Cr-Commit-Position: refs/heads/master@{#419073}
(cherry picked from commit 864df709bb6b675152537a276723c2d0a8757e48)
==========

to

==========
Merge "submit() in submit event handler should not contains a value of a submit
button." to M54 branch

The value of a submit button is appended to a FormData if its activatedSubmit
flag
is set.
In a case of form.submit() is called in submit event handler, we did:

1. Set activatedSubmit flag of the submit button
2. Dispatch submit event
2.1. form.submit() builds FormData
3. Build FormData if the submit event was not prevented
4. Clear activatedSubmit flag of the submit button

In step 2.1, we should not include the submit button. So, this CL changes the
process as follows:

1. Dispatch submit event
1.1 form.submit() builds FormData
2. If the submit event was not prevented,
2.1. Set activatedSubmit flag of the submit button
2.2. Build FormData
2.3. Clear activatedSubmit flag of the submit button

Implementation:
We called setActivatedSubmit() before/after prepareForSubmission(). Instead, we
pass a submit button element to prepareForSubmission(), and call
setActivatedSubmit() just before/after building FormData.

BUG=646790

Review-Url: https://codereview.chromium.org/2340213002
Cr-Commit-Position: refs/heads/master@{#419073}
(cherry picked from commit 864df709bb6b675152537a276723c2d0a8757e48)

Committed:
https://chromium.googlesource.com/chromium/src/+/f8be4fbd37d679e362c0eac49098...
==========

[tkent, 2016-09-16 11:56:54]

Committed patchset #1 (id:1) manually as
f8be4fbd37d679e362c0eac49098fa913dc51ef3.