Revert of PlzNavigate: inform the WebFrameClient that a form will be submitted

Revert of PlzNavigate: inform the WebFrameClient that a form will be submitted (patchset #4 id:60001 of https://codereview.chromium.org/1446253002/ )

Reason for revert:
This is causing a bunch of crashes on Canary. Details are in https://crbug.com/591910.

Original issue's description:
> PlzNavigate: inform the WebFrameClient that a form will be submitted
>
> This CL makes it so that the WebFrameClient is informed that a form will be
> submitted when the embedder handles the navigation.
>
> BUG=504347
>
> Committed: https://crrev.com/bca103622d505bb537dbc2032de5fcd051c39e0d
> Cr-Commit-Position: refs/heads/master@{#379001}

TBR=dcheng@chromium.org,japhet@chromium.org,clamy@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=504347
Committed: https://crrev.com/35fa1b226afdc5623af8389dc7454ac67eb2e62a
Cr-Commit-Position: refs/heads/master@{#379353}

[nasko, 2016-03-04 19:03:20]

Created Revert of PlzNavigate: inform the WebFrameClient that a form will be
submitted

[commit-bot: I haz the power, 2016-03-04 19:03:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1767693002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1767693002/1

[commit-bot: I haz the power, 2016-03-04 19:31:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1767693002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1767693002/1

[commit-bot: I haz the power, 2016-03-04 20:01:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1767693002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1767693002/1

[commit-bot: I haz the power, 2016-03-04 20:31:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1767693002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1767693002/1

[commit-bot: I haz the power, 2016-03-04 20:56:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-04 20:57:45]

Description was changed from

==========
Revert of PlzNavigate: inform the WebFrameClient that a form will be submitted
(patchset #4 id:60001 of https://codereview.chromium.org/1446253002/ )

Reason for revert:
This is causing a bunch of crashes on Canary. Details are in
https://crbug.com/591910.

Original issue's description:
> PlzNavigate: inform the WebFrameClient that a form will be submitted
> 
> This CL makes it so that the WebFrameClient is informed that a form will be
> submitted when the embedder handles the navigation.
> 
> BUG=504347
> 
> Committed: https://crrev.com/bca103622d505bb537dbc2032de5fcd051c39e0d
> Cr-Commit-Position: refs/heads/master@{#379001}

TBR=dcheng@chromium.org,japhet@chromium.org,clamy@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=504347
==========

to

==========
Revert of PlzNavigate: inform the WebFrameClient that a form will be submitted
(patchset #4 id:60001 of https://codereview.chromium.org/1446253002/ )

Reason for revert:
This is causing a bunch of crashes on Canary. Details are in
https://crbug.com/591910.

Original issue's description:
> PlzNavigate: inform the WebFrameClient that a form will be submitted
>
> This CL makes it so that the WebFrameClient is informed that a form will be
> submitted when the embedder handles the navigation.
>
> BUG=504347
>
> Committed: https://crrev.com/bca103622d505bb537dbc2032de5fcd051c39e0d
> Cr-Commit-Position: refs/heads/master@{#379001}

TBR=dcheng@chromium.org,japhet@chromium.org,clamy@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=504347

Committed: https://crrev.com/35fa1b226afdc5623af8389dc7454ac67eb2e62a
Cr-Commit-Position: refs/heads/master@{#379353}
==========

[commit-bot: I haz the power, 2016-03-04 20:57:47]

Patchset 1 (id:??) landed as
https://crrev.com/35fa1b226afdc5623af8389dc7454ac67eb2e62a
Cr-Commit-Position: refs/heads/master@{#379353}