Revert of Use a bitmap to record PageMemoryRegion usage.

Revert of Use a bitmap to record PageMemoryRegion usage. (patchset #1 id:1 of https://codereview.chromium.org/1748363005/ )

Reason for revert:
Using a bitmap is problematic as pages within a region may belong to different threads (see https://crbug.com/591217 ).

Revert back to previous and use a separate bool per thread to avoid overlap.

Original issue's description:
> Use a bitmap to record PageMemoryRegion usage.
>
> R=haraken
> BUG=420515
>
> Committed: https://crrev.com/648b0ff04620c688b1d8926b06220f45da3e4598
> Cr-Commit-Position: refs/heads/master@{#378449}

TBR=oilpan-reviews@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=420515
Committed: https://crrev.com/88336cbc14c314ee0b5d6c445ad2dca23ad5892a
Cr-Commit-Position: refs/heads/master@{#378756}

[sof, 2016-03-02 16:03:26]

Created Revert of Use a bitmap to record PageMemoryRegion usage.

[haraken, 2016-03-02 16:03:47]

LGTM

[commit-bot: I haz the power, 2016-03-02 16:04:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1749103005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1749103005/1

[commit-bot: I haz the power, 2016-03-02 16:04:55]

Description was changed from

==========
Revert of Use a bitmap to record PageMemoryRegion usage. (patchset #1 id:1 of
https://codereview.chromium.org/1748363005/ )

Reason for revert:
Using a bitmap is problematic as pages within a region may belong to different
threads (see https://crbug.com/591217 ).

Revert back to previous and use a separate bool per thread to avoid overlap.

Original issue's description:
> Use a bitmap to record PageMemoryRegion usage.
> 
> R=haraken
> BUG=420515
> 
> Committed: https://crrev.com/648b0ff04620c688b1d8926b06220f45da3e4598
> Cr-Commit-Position: refs/heads/master@{#378449}

TBR=oilpan-reviews@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=420515
==========

to

==========
Revert of Use a bitmap to record PageMemoryRegion usage. (patchset #1 id:1 of
https://codereview.chromium.org/1748363005/ )

Reason for revert:
Using a bitmap is problematic as pages within a region may belong to different
threads (see https://crbug.com/591217 ).

Revert back to previous and use a separate bool per thread to avoid overlap.

Original issue's description:
> Use a bitmap to record PageMemoryRegion usage.
> 
> R=haraken
> BUG=420515
> 
> Committed: https://crrev.com/648b0ff04620c688b1d8926b06220f45da3e4598
> Cr-Commit-Position: refs/heads/master@{#378449}

TBR=oilpan-reviews@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=420515
==========

[commit-bot: I haz the power, 2016-03-02 16:04:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-02 16:06:11]

Description was changed from

==========
Revert of Use a bitmap to record PageMemoryRegion usage. (patchset #1 id:1 of
https://codereview.chromium.org/1748363005/ )

Reason for revert:
Using a bitmap is problematic as pages within a region may belong to different
threads (see https://crbug.com/591217 ).

Revert back to previous and use a separate bool per thread to avoid overlap.

Original issue's description:
> Use a bitmap to record PageMemoryRegion usage.
> 
> R=haraken
> BUG=420515
> 
> Committed: https://crrev.com/648b0ff04620c688b1d8926b06220f45da3e4598
> Cr-Commit-Position: refs/heads/master@{#378449}

TBR=oilpan-reviews@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=420515
==========

to

==========
Revert of Use a bitmap to record PageMemoryRegion usage. (patchset #1 id:1 of
https://codereview.chromium.org/1748363005/ )

Reason for revert:
Using a bitmap is problematic as pages within a region may belong to different
threads (see https://crbug.com/591217 ).

Revert back to previous and use a separate bool per thread to avoid overlap.

Original issue's description:
> Use a bitmap to record PageMemoryRegion usage.
>
> R=haraken
> BUG=420515
>
> Committed: https://crrev.com/648b0ff04620c688b1d8926b06220f45da3e4598
> Cr-Commit-Position: refs/heads/master@{#378449}

TBR=oilpan-reviews@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=420515

Committed: https://crrev.com/88336cbc14c314ee0b5d6c445ad2dca23ad5892a
Cr-Commit-Position: refs/heads/master@{#378756}
==========

[commit-bot: I haz the power, 2016-03-02 16:06:12]

Patchset 1 (id:??) landed as
https://crrev.com/88336cbc14c314ee0b5d6c445ad2dca23ad5892a
Cr-Commit-Position: refs/heads/master@{#378756}