Revert 148647 "Remove frame flattening support as Chromium has n..."

Revert 148647 "Remove frame flattening support as Chromium has n..."

Lots of tests have started failing on all bots.

> Remove frame flattening support as Chromium has no intention of using it
> 
> Chromium does not use the frame flattening code on any platform, though it used
> to use it for frameset flattening on Android, but that is no longer the case.
> 
> As there is no intention of ever using it, it should be removed.
> 
> Committed on behalf of Kenneth Rohde Christiansen <kenneth.r.christiansen@intel.com>;.
> 
> BUG=231898
> 
> Review URL: https://codereview.chromium.org/13963006

TBR=mkwst@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=148649

[apavlov, 2013-04-18 14:02:28]

Committed patchset #1 manually as r148649.

[ojan, 2013-04-18 20:53:04]

On 2013/04/18 14:02:28, apavlov wrote:
> Committed patchset #1 manually as r148649.

Link to a build that failed:
http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux/builds/9079

Please include more data in the revert message so that it's easy for the patch
author to know exactly what failed.