Fix the position of AutofillClient for PasswordAutofillManager when the focused form element is ins…

Fix the position of AutofillClient for PasswordAutofillManager when the focused form element is inside OOPIF

When a form element is inside an OOPIF, the coordinates which are sent from
renderer are with respect to the WebFrameWidget's coordinates and need to be
transformed to root coordinate on the browser side. Without this change the
position of the autofill pop-up is incorrect.

This CL transforms the element bound to root view's coordinate before showing
the autofill pop-up.

BUG=686129
Review-Url: https://codereview.chromium.org/2754033002
Cr-Commit-Position: refs/heads/master@{#458593}
(cherry picked from commit 6f15a2dc3a3b9bd111352a58c40cf1a1ea0e9652)

Review-Url: https://codereview.chromium.org/2770363002 .
Cr-Commit-Position: refs/branch-heads/3029@{#414}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/d4ea62753e0609689d9c8de1443ca985f2366e25

[EhsanK, 2017-03-24 21:06:46]

Description was changed from

==========
Fix the position of AutofillClient for PasswordAutofillManager when the focused
form element is inside OOPIF

When a form element is inside an OOPIF, the coordinates which are sent from
renderer are with respect to the WebFrameWidget's coordinates and need to be
transformed to root coordinate on the browser side. Without this change the
position of the autofill pop-up is incorrect.

This CL transforms the element bound to root view's coordinate before showing
the autofill pop-up.

BUG=686129

Review-Url: https://codereview.chromium.org/2754033002
Cr-Commit-Position: refs/heads/master@{#458593}
(cherry picked from commit 6f15a2dc3a3b9bd111352a58c40cf1a1ea0e9652)
==========

to

==========
Fix the position of AutofillClient for PasswordAutofillManager when the focused
form element is inside OOPIF

When a form element is inside an OOPIF, the coordinates which are sent from
renderer are with respect to the WebFrameWidget's coordinates and need to be
transformed to root coordinate on the browser side. Without this change the
position of the autofill pop-up is incorrect.

This CL transforms the element bound to root view's coordinate before showing
the autofill pop-up.

BUG=686129

Review-Url: https://codereview.chromium.org/2754033002
Cr-Commit-Position: refs/heads/master@{#458593}
(cherry picked from commit 6f15a2dc3a3b9bd111352a58c40cf1a1ea0e9652)

Review-Url: https://codereview.chromium.org/2770363002 .
Cr-Commit-Position: refs/branch-heads/3029@{#414}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/d4ea62753e0609689d9c8de1443c...
==========

[EhsanK, 2017-03-24 21:06:48]

Committed patchset #1 (id:1) manually as
d4ea62753e0609689d9c8de1443ca985f2366e25.