Reland of Take care of a FIXME in SecurityOrigin.cpp to check the validity

Reland of Take care of a FIXME in SecurityOrigin.cpp to check the validity (patchset #1 id:1 of https://codereview.chromium.org/1315793002/ )

Reason for revert:
Failure still present.

Original issue's description:
> Revert of Take care of a FIXME in SecurityOrigin.cpp to check the validity of any innerURL during constructio… (patchset #4 id:60001 of https://codereview.chromium.org/1294933004/ )
> 
> Reason for revert:
> Speculative revert for "Too many opened files in the system".
> 
> Original issue's description:
> > Take care of a FIXME in SecurityOrigin.cpp to check the validity of any innerURL during construction and to handle invalidity as a 'unique' origin.
> > 
> > TBR=mkwst
> > BUG=514076
> > 
> > Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201022
> 
> TBR=jsbell@chromium.org,palmer@chromium.org,mkwst@chromium.org,brettw@chromium.org,michaeln@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=514076, 524248
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201100

TBR=brettw@chromium.org,jsbell@chromium.org,michaeln@chromium.org,mkwst@chromium.org,palmer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=514076, 524248
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201102

[dstockwell, 2015-08-25 04:53:04]

Created Reland of Take care of a FIXME in SecurityOrigin.cpp to check the
validity

[dstockwell, 2015-08-25 04:53:19]

The CQ bit was checked by dstockwell@chromium.org

[commit-bot: I haz the power, 2015-08-25 04:53:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1309333004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1309333004/1

[commit-bot: I haz the power, 2015-08-25 04:54:02]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201102