Revert of Move SelectionAdjust to its own file

Revert of Move SelectionAdjust to its own file (patchset #2 id:20001 of https://codereview.chromium.org/1640623002/ )

Reason for revert:
This refactoring breaks text selection in DevTools console. Please see http://crbug.com/581800 for details

Original issue's description:
> Move SelectionAdjuster to its own file
>
> This patch moves implementations of |SelectionAdjuster| into its own file.
>
> This is a follow-up patch of http://crrev.com/1630903005, which introduces
> |SelectionAdjuster| into "SelectionEditor.cpp" and "VisibleSelection.cpp".
>
> BUG=n/a
> TEST=n/a; no behavior changes
>
> Committed: https://crrev.com/da8f47a0153b025331e2c8ed62c4f6510c63c703
> Cr-Commit-Position: refs/heads/master@{#371751}

TBR=tkent@chromium.org,yosin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=n/a

Committed: https://crrev.com/39d0fed9c6301bb378c26c913a579bb738b221c9
Cr-Commit-Position: refs/heads/master@{#371854}

[lushnikov, 2016-01-27 20:13:35]

Created Revert of Move SelectionAdjust to its own file

[commit-bot: I haz the power, 2016-01-27 20:15:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1640913002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1640913002/1

[commit-bot: I haz the power, 2016-01-27 20:18:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-27 20:19:33]

Description was changed from

==========
Revert of Move SelectionAdjust to its own file (patchset #2 id:20001 of
https://codereview.chromium.org/1640623002/ )

Reason for revert:
This refactoring breaks text selection in DevTools console. Please see
http://crbug.com/581800 for details

Original issue's description:
> Move SelectionAdjuster to its own file
> 
> This patch moves implementations of |SelectionAdjuster| into its own file.
> 
> This is a follow-up patch of http://crrev.com/1630903005, which introduces
> |SelectionAdjuster| into "SelectionEditor.cpp" and "VisibleSelection.cpp".
> 
> BUG=n/a
> TEST=n/a; no behavior changes
> 
> Committed: https://crrev.com/da8f47a0153b025331e2c8ed62c4f6510c63c703
> Cr-Commit-Position: refs/heads/master@{#371751}

TBR=tkent@chromium.org,yosin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=n/a
==========

to

==========
Revert of Move SelectionAdjust to its own file (patchset #2 id:20001 of
https://codereview.chromium.org/1640623002/ )

Reason for revert:
This refactoring breaks text selection in DevTools console. Please see
http://crbug.com/581800 for details

Original issue's description:
> Move SelectionAdjuster to its own file
>
> This patch moves implementations of |SelectionAdjuster| into its own file.
>
> This is a follow-up patch of http://crrev.com/1630903005, which introduces
> |SelectionAdjuster| into "SelectionEditor.cpp" and "VisibleSelection.cpp".
>
> BUG=n/a
> TEST=n/a; no behavior changes
>
> Committed: https://crrev.com/da8f47a0153b025331e2c8ed62c4f6510c63c703
> Cr-Commit-Position: refs/heads/master@{#371751}

TBR=tkent@chromium.org,yosin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=n/a

Committed: https://crrev.com/39d0fed9c6301bb378c26c913a579bb738b221c9
Cr-Commit-Position: refs/heads/master@{#371854}
==========

[commit-bot: I haz the power, 2016-01-27 20:19:34]

Patchset 1 (id:??) landed as
https://crrev.com/39d0fed9c6301bb378c26c913a579bb738b221c9
Cr-Commit-Position: refs/heads/master@{#371854}