Revert of Add a check to the FindBadConstructs.cpp clang plugin for bad enum last values.

Revert of Add a check to the FindBadConstructs.cpp clang plugin for bad enum last values. (https://codereview.chromium.org/150943005/)

Reason for revert:
Caused crbug.com/356815 and crbug.com/356816 and doesn't have a flag to turn it off.

Original issue's description:
> Add a check to the FindBadConstructs.cpp clang plugin for bad enum last values.
> 
> One common coding patern is to define an enum as in:
>   enum Color { RED, GREEN, BLUE, COLOR_LAST=BLUE };
> but this is fragile when someone adds a new constant and forgets
> to update the COLOR_LAST constant.
> 
> This change looks for enums that have a xxx_LAST or xxxLast member,
> and warns if there are any higher-valued constants present.
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=251894

TBR=erg@google.com,darin@chromium.org,erg@chromium.org,tsepez@chromium.org
NOTREECHECKS=true
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=259675

[Nico, 2014-03-26 20:44:17]

Created Revert of Add a check to the FindBadConstructs.cpp clang plugin for bad
enum last values.

[commit-bot: I haz the power, 2014-03-26 20:45:15]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/thakis@chromium.org/212673008/1

[commit-bot: I haz the power, 2014-03-26 20:46:52]

Change committed as 259675