Revert of OOPIF: Enable TabAndMouseFocusNavigation.

Revert of OOPIF: Enable TabAndMouseFocusNavigation. (patchset #8 id:140001 of https://codereview.chromium.org/2796533002/ )

Reason for revert:
Test is flaky on Linux Tests bot:
https://build.chromium.org/p/chromium.linux/builders/Linux%20Tests/builds/54519

Original issue's description:
> OOPIF: Enable TabAndMouseFocusNavigation.
> 
> When advancing focus into an iframe, allow the frame to focus itself
> after deciding which element will be focused. This prevents sending a
> focus event to the previous element in that frame only to blur it
> immediately. Non-oopifs simply fire a focus event to the new element,
> the previously focused element in that frame received a blur event when
> another frame was focused.
> 
> The test ensures a consistent state when mixing tab and clicking
> navigation. In specific cases, focus would early out when the element to
> advance to was previously focused, and never cleared when the mouse is
> clicked in another frame.
> 
> BUG=702330
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
> 
> Review-Url: https://codereview.chromium.org/2796533002
> Cr-Commit-Position: refs/heads/master@{#463006}
> Committed: https://chromium.googlesource.com/chromium/src/+/6a539b43629daa2a49d5603fea5ade7d48d31dd2

TBR=alexmos@chromium.org,dcheng@chromium.org,avallee@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=702330
Review-Url: https://codereview.chromium.org/2804303004
Cr-Commit-Position: refs/heads/master@{#463071}
Committed: https://chromium.googlesource.com/chromium/src/+/3b7e3fac6988ecb6dd1d2465aee41e473724c9d2

[Charlie Reis, 2017-04-08 00:21:33]

The CQ bit was checked by creis@chromium.org

[Charlie Reis, 2017-04-08 00:21:34]

Created Revert of OOPIF: Enable TabAndMouseFocusNavigation.

[commit-bot: I haz the power, 2017-04-08 00:22:11]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-08 00:25:31]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1491610893678200, "parent_rev":
"bb4b4de1b5a2b99c62e71b93f6c157e8290e3c3b", "commit_rev":
"3b7e3fac6988ecb6dd1d2465aee41e473724c9d2"}

[commit-bot: I haz the power, 2017-04-08 00:27:04]

Description was changed from

==========
Revert of OOPIF: Enable TabAndMouseFocusNavigation. (patchset #8 id:140001 of
https://codereview.chromium.org/2796533002/ )

Reason for revert:
Test is flaky on Linux Tests bot:
https://build.chromium.org/p/chromium.linux/builders/Linux%20Tests/builds/54519

Original issue's description:
> OOPIF: Enable TabAndMouseFocusNavigation.
> 
> When advancing focus into an iframe, allow the frame to focus itself
> after deciding which element will be focused. This prevents sending a
> focus event to the previous element in that frame only to blur it
> immediately. Non-oopifs simply fire a focus event to the new element,
> the previously focused element in that frame received a blur event when
> another frame was focused.
> 
> The test ensures a consistent state when mixing tab and clicking
> navigation. In specific cases, focus would early out when the element to
> advance to was previously focused, and never cleared when the mouse is
> clicked in another frame.
> 
> BUG=702330
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
> 
> Review-Url: https://codereview.chromium.org/2796533002
> Cr-Commit-Position: refs/heads/master@{#463006}
> Committed:
https://chromium.googlesource.com/chromium/src/+/6a539b43629daa2a49d5603fea5a...

TBR=alexmos@chromium.org,dcheng@chromium.org,avallee@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=702330
==========

to

==========
Revert of OOPIF: Enable TabAndMouseFocusNavigation. (patchset #8 id:140001 of
https://codereview.chromium.org/2796533002/ )

Reason for revert:
Test is flaky on Linux Tests bot:
https://build.chromium.org/p/chromium.linux/builders/Linux%20Tests/builds/54519

Original issue's description:
> OOPIF: Enable TabAndMouseFocusNavigation.
> 
> When advancing focus into an iframe, allow the frame to focus itself
> after deciding which element will be focused. This prevents sending a
> focus event to the previous element in that frame only to blur it
> immediately. Non-oopifs simply fire a focus event to the new element,
> the previously focused element in that frame received a blur event when
> another frame was focused.
> 
> The test ensures a consistent state when mixing tab and clicking
> navigation. In specific cases, focus would early out when the element to
> advance to was previously focused, and never cleared when the mouse is
> clicked in another frame.
> 
> BUG=702330
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
> 
> Review-Url: https://codereview.chromium.org/2796533002
> Cr-Commit-Position: refs/heads/master@{#463006}
> Committed:
https://chromium.googlesource.com/chromium/src/+/6a539b43629daa2a49d5603fea5a...

TBR=alexmos@chromium.org,dcheng@chromium.org,avallee@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=702330

Review-Url: https://codereview.chromium.org/2804303004
Cr-Commit-Position: refs/heads/master@{#463071}
Committed:
https://chromium.googlesource.com/chromium/src/+/3b7e3fac6988ecb6dd1d2465aee4...
==========

[commit-bot: I haz the power, 2017-04-08 00:27:06]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/3b7e3fac6988ecb6dd1d2465aee4...