Revert of Remove unnecessary spin in ToolTipController

Revert of Remove unnecessary spin in ToolTipController (patchset #7 id:520001 of https://codereview.chromium.org/2615993002/ )

Reason for revert:
Caused the regression 682141.

Original issue's description:
> Remove unnecessary spin in ToolTipController
> 
> The motivation for the change is to reduce idle wakeups and therefore 
> reduce idle power.
> 
> ToolTipController has a repeating 500ms timer that tries to update 
> itself periodically, while most of the time there is no change at all.
> 
> This CL removes this spin but keeps the same functionality by 
> 1) upgrading OnMouseEvent() in TooltipController;
> 2) overriding OnWindowPropertyChanged() in TooltipController;
> 3) overriding OnCursorVisibilityChanged() in TooltipController.
> 
> After the change, tooltip is updated on demand via observer pattern,
> rather than unnecessary periodic checking.
> 
> BUG=668198
> 
> Review-Url: https://codereview.chromium.org/2615993002
> Cr-Commit-Position: refs/heads/master@{#443584}
> Committed: https://chromium.googlesource.com/chromium/src/+/6b8312a4903fc6965a64a3835524f1a8f384f26b

TBR=brucedawson@chromium.org,sky@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=668198
Review-Url: https://codereview.chromium.org/2643973002
Cr-Commit-Position: refs/heads/master@{#444576}
Committed: https://chromium.googlesource.com/chromium/src/+/36d50e667f1639241bb8a0798086c764e350047e

[chengx, 2017-01-18 22:50:40]

The CQ bit was checked by chengx@chromium.org

[chengx, 2017-01-18 22:50:40]

Created Revert of Remove unnecessary spin in ToolTipController

[commit-bot: I haz the power, 2017-01-18 22:51:22]

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, 2017-01-18 22:51:22]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-18 22:51:24]

No L-G-T-M from a valid reviewer yet. 
CQ run can only be started by full committers or once the patch has
received an L-G-T-M from a full committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[chengx, 2017-01-18 23:16:39]

Hi, the previous tooltip fix caused regression issue 682141. Though the fix
should be small, I am not able to fix it as I am not in the office this week. So
I will revert that CL for now.

I am not a committer, so I need a LGTM from any of you to revert the CL.

Thanks!

[sky, 2017-01-18 23:38:42]

LGTM

[chengx, 2017-01-18 23:46:30]

The CQ bit was checked by chengx@chromium.org

[commit-bot: I haz the power, 2017-01-18 23:47:12]

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, 2017-01-19 00:55:08]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484783190292900, "parent_rev":
"e9762587b94da23ce580995d1c7fa6ff7bf456f5", "commit_rev":
"36d50e667f1639241bb8a0798086c764e350047e"}

[commit-bot: I haz the power, 2017-01-19 00:55:42]

Description was changed from

==========
Revert of Remove unnecessary spin in ToolTipController (patchset #7 id:520001 of
https://codereview.chromium.org/2615993002/ )

Reason for revert:
Caused the regression 682141.

Original issue's description:
> Remove unnecessary spin in ToolTipController
> 
> The motivation for the change is to reduce idle wakeups and therefore 
> reduce idle power.
> 
> ToolTipController has a repeating 500ms timer that tries to update 
> itself periodically, while most of the time there is no change at all.
> 
> This CL removes this spin but keeps the same functionality by 
> 1) upgrading OnMouseEvent() in TooltipController;
> 2) overriding OnWindowPropertyChanged() in TooltipController;
> 3) overriding OnCursorVisibilityChanged() in TooltipController.
> 
> After the change, tooltip is updated on demand via observer pattern,
> rather than unnecessary periodic checking.
> 
> BUG=668198
> 
> Review-Url: https://codereview.chromium.org/2615993002
> Cr-Commit-Position: refs/heads/master@{#443584}
> Committed:
https://chromium.googlesource.com/chromium/src/+/6b8312a4903fc6965a64a3835524...

TBR=brucedawson@chromium.org,sky@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=668198
==========

to

==========
Revert of Remove unnecessary spin in ToolTipController (patchset #7 id:520001 of
https://codereview.chromium.org/2615993002/ )

Reason for revert:
Caused the regression 682141.

Original issue's description:
> Remove unnecessary spin in ToolTipController
> 
> The motivation for the change is to reduce idle wakeups and therefore 
> reduce idle power.
> 
> ToolTipController has a repeating 500ms timer that tries to update 
> itself periodically, while most of the time there is no change at all.
> 
> This CL removes this spin but keeps the same functionality by 
> 1) upgrading OnMouseEvent() in TooltipController;
> 2) overriding OnWindowPropertyChanged() in TooltipController;
> 3) overriding OnCursorVisibilityChanged() in TooltipController.
> 
> After the change, tooltip is updated on demand via observer pattern,
> rather than unnecessary periodic checking.
> 
> BUG=668198
> 
> Review-Url: https://codereview.chromium.org/2615993002
> Cr-Commit-Position: refs/heads/master@{#443584}
> Committed:
https://chromium.googlesource.com/chromium/src/+/6b8312a4903fc6965a64a3835524...

TBR=brucedawson@chromium.org,sky@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=668198

Review-Url: https://codereview.chromium.org/2643973002
Cr-Commit-Position: refs/heads/master@{#444576}
Committed:
https://chromium.googlesource.com/chromium/src/+/36d50e667f1639241bb8a0798086...
==========

[commit-bot: I haz the power, 2017-01-19 00:55:44]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/36d50e667f1639241bb8a0798086...