Avoid Context::Enter and Context::Exit if we're reentering the active and last entered context

Reland of Avoid Context::Enter and Context::Exit if we're reentering the active and last entered context (patchset #1 id:1 of https://codereview.chromium.org/2140563002/ )

Reason for reland:
https://codereview.chromium.org/2122953002 fixed context issues.

Original issue's description:
> Revert of Avoid Context::Enter and Context::Exit if we're reentering the active and last entered context (patchset #2 id:20001 of https://codereview.chromium.org/2131483002/ )
>
> Reason for revert:
> crashes: crbug.com/626719
>
> Original issue's description:
> > Avoid Context::Enter and Context::Exit if we're reentering the active and last entered context
> >
> > A bit of browsing around indicates that the new fast-path is taken most of the time:
> >    3496 Entering new
> >  152295 Reentering same
> >
> > BUG=
> >
> > Committed: https://crrev.com/1829eb661ef1cf432fb551bcb193f521a219d490
> > Cr-Commit-Position: refs/heads/master@{#37570}
>
> TBR=jochen@chromium.org,verwaest@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=
>
> Committed: https://crrev.com/bec49a4876fdf8a20600ecdfc8534d0ef45c9528
> Cr-Commit-Position: refs/heads/master@{#37632}

TBR=jochen@chromium.org,verwaest@chromium.org,jkummerow@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=

Committed: https://crrev.com/1b44afe53720edc43c525ff92b212f76adb47170
Cr-Commit-Position: refs/heads/master@{#37778}

[Camillo Bruni, 2016-07-14 16:26:19]

Created Reland of Avoid Context::Enter and Context::Exit if we're reentering the
active and last entered context

[Camillo Bruni, 2016-07-14 16:27:00]

Description was changed from

==========
Reland of Avoid Context::Enter and Context::Exit if we're reentering the active
and last entered context (patchset #1 id:1 of
https://codereview.chromium.org/2140563002/ )

Reason for revert:
https://codereview.chromium.org/2122953002 fixed context issues.

Original issue's description:
> Revert of Avoid Context::Enter and Context::Exit if we're reentering the
active and last entered context (patchset #2 id:20001 of
https://codereview.chromium.org/2131483002/ )
> 
> Reason for revert:
> crashes: crbug.com/626719
> 
> Original issue's description:
> > Avoid Context::Enter and Context::Exit if we're reentering the active and
last entered context
> >
> > A bit of browsing around indicates that the new fast-path is taken most of
the time:
> >    3496 Entering new
> >  152295 Reentering same
> >
> > BUG=
> >
> > Committed: https://crrev.com/1829eb661ef1cf432fb551bcb193f521a219d490
> > Cr-Commit-Position: refs/heads/master@{#37570}
> 
> TBR=jochen@chromium.org,verwaest@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=
> 
> Committed: https://crrev.com/bec49a4876fdf8a20600ecdfc8534d0ef45c9528
> Cr-Commit-Position: refs/heads/master@{#37632}

TBR=jochen@chromium.org,verwaest@chromium.org,jkummerow@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=
==========

to

==========
Reland of Avoid Context::Enter and Context::Exit if we're reentering the active
and last entered context (patchset #1 id:1 of
https://codereview.chromium.org/2140563002/ )

Reason for reland:
https://codereview.chromium.org/2122953002 fixed context issues.

Original issue's description:
> Revert of Avoid Context::Enter and Context::Exit if we're reentering the
active and last entered context (patchset #2 id:20001 of
https://codereview.chromium.org/2131483002/ )
> 
> Reason for revert:
> crashes: crbug.com/626719
> 
> Original issue's description:
> > Avoid Context::Enter and Context::Exit if we're reentering the active and
last entered context
> >
> > A bit of browsing around indicates that the new fast-path is taken most of
the time:
> >    3496 Entering new
> >  152295 Reentering same
> >
> > BUG=
> >
> > Committed: https://crrev.com/1829eb661ef1cf432fb551bcb193f521a219d490
> > Cr-Commit-Position: refs/heads/master@{#37570}
> 
> TBR=jochen@chromium.org,verwaest@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=
> 
> Committed: https://crrev.com/bec49a4876fdf8a20600ecdfc8534d0ef45c9528
> Cr-Commit-Position: refs/heads/master@{#37632}

TBR=jochen@chromium.org,verwaest@chromium.org,jkummerow@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=
==========

[Camillo Bruni, 2016-07-14 16:27:09]

The CQ bit was checked by cbruni@chromium.org

[commit-bot: I haz the power, 2016-07-14 16:27:15]

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, 2016-07-14 16:58:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-14 17:00:39]

Description was changed from

==========
Reland of Avoid Context::Enter and Context::Exit if we're reentering the active
and last entered context (patchset #1 id:1 of
https://codereview.chromium.org/2140563002/ )

Reason for reland:
https://codereview.chromium.org/2122953002 fixed context issues.

Original issue's description:
> Revert of Avoid Context::Enter and Context::Exit if we're reentering the
active and last entered context (patchset #2 id:20001 of
https://codereview.chromium.org/2131483002/ )
> 
> Reason for revert:
> crashes: crbug.com/626719
> 
> Original issue's description:
> > Avoid Context::Enter and Context::Exit if we're reentering the active and
last entered context
> >
> > A bit of browsing around indicates that the new fast-path is taken most of
the time:
> >    3496 Entering new
> >  152295 Reentering same
> >
> > BUG=
> >
> > Committed: https://crrev.com/1829eb661ef1cf432fb551bcb193f521a219d490
> > Cr-Commit-Position: refs/heads/master@{#37570}
> 
> TBR=jochen@chromium.org,verwaest@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=
> 
> Committed: https://crrev.com/bec49a4876fdf8a20600ecdfc8534d0ef45c9528
> Cr-Commit-Position: refs/heads/master@{#37632}

TBR=jochen@chromium.org,verwaest@chromium.org,jkummerow@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=
==========

to

==========
Reland of Avoid Context::Enter and Context::Exit if we're reentering the active
and last entered context (patchset #1 id:1 of
https://codereview.chromium.org/2140563002/ )

Reason for reland:
https://codereview.chromium.org/2122953002 fixed context issues.

Original issue's description:
> Revert of Avoid Context::Enter and Context::Exit if we're reentering the
active and last entered context (patchset #2 id:20001 of
https://codereview.chromium.org/2131483002/ )
>
> Reason for revert:
> crashes: crbug.com/626719
>
> Original issue's description:
> > Avoid Context::Enter and Context::Exit if we're reentering the active and
last entered context
> >
> > A bit of browsing around indicates that the new fast-path is taken most of
the time:
> >    3496 Entering new
> >  152295 Reentering same
> >
> > BUG=
> >
> > Committed: https://crrev.com/1829eb661ef1cf432fb551bcb193f521a219d490
> > Cr-Commit-Position: refs/heads/master@{#37570}
>
> TBR=jochen@chromium.org,verwaest@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=
>
> Committed: https://crrev.com/bec49a4876fdf8a20600ecdfc8534d0ef45c9528
> Cr-Commit-Position: refs/heads/master@{#37632}

TBR=jochen@chromium.org,verwaest@chromium.org,jkummerow@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=

Committed: https://crrev.com/1b44afe53720edc43c525ff92b212f76adb47170
Cr-Commit-Position: refs/heads/master@{#37778}
==========

[commit-bot: I haz the power, 2016-07-14 17:00:40]

Patchset 1 (id:??) landed as
https://crrev.com/1b44afe53720edc43c525ff92b212f76adb47170
Cr-Commit-Position: refs/heads/master@{#37778}