Revert of Hash sink IDs with a resettable salt. (https://codereview.chromium.org/111703002/)

Reason for revert:
Reverting, tests failed, need to investigate before relanding. 

Original issue's description:
> Hash sink IDs with a resettable salt.
> 
> BUG=298158
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=244944

TBR=perkj@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=298158

Review URL: https://codereview.chromium.org/133703013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245021 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245021