Revert of Fix RemoteFrame detachment to signal its client.

Revert of Fix RemoteFrame detachment to signal its client. (patchset #1 id:1 of https://codereview.chromium.org/712653002/)

Reason for revert:
Speculative revert to attempt to fix https://code.google.com/p/chromium/issues/detail?id=431608

Original issue's description:
> Fix RemoteFrame detachment to signal its client.
> 
> We were seeing crashes in checkFrameCountConsistency() because during
> RemoteFrame detachment the client was not getting signalled to modify
> the frame tree, resulting in inconsistent state. This CL corrects that
> problem.
> 
> BUG=430972
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184987

TBR=japhet@chromium.org,dcheng@chromium.org,kenrb@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=430972
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=185015

[raymes, 2014-11-10 01:16:08]

Created Revert of Fix RemoteFrame detachment to signal its client.

[commit-bot: I haz the power, 2014-11-10 01:16:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/699053004/1

[commit-bot: I haz the power, 2014-11-10 01:17:03]

Committed patchset #1 (id:1) as 185015

[raymes, 2014-11-10 03:05:53]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/709363002/ by raymes@chromium.org.

The reason for reverting is: Reverting the revert. This turned out not to be the
cause of https://code.google.com/p/chromium/issues/detail?id=431608.