Revert of Listen for key events in SetupXI2ForXWindow()

Revert of Listen for key events in SetupXI2ForXWindow() (https://codereview.chromium.org/404423002/)

Reason for revert:
The patch regressed editing behavior: crbug.com/401450

TBR=kpschoedel
NOTRY=true

Original issue's description:
> Listen for key events in SetupXI2ForXWindow()
> 
> BUG=368750
> R=sadrul
> TEST=on device and desktop
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287772

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=288039

[lushnikov, 2014-08-07 11:51:01]

Created Revert of Listen for key events in SetupXI2ForXWindow()

[commit-bot: I haz the power, 2014-08-07 11:52:22]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/lushnikov@chromium.org/445413002/1

[commit-bot: I haz the power, 2014-08-07 11:52:23]

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

[commit-bot: I haz the power, 2014-08-07 11:52:23]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional 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.

[lushnikov, 2014-08-07 11:55:04]

The CQ bit was checked by lushnikov@chromium.org

[commit-bot: I haz the power, 2014-08-07 11:55:59]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/lushnikov@chromium.org/445413002/1

[commit-bot: I haz the power, 2014-08-07 11:57:10]

Change committed as 288039