Revert 250744 "Use the same handle for checking and duplicating ..."

Broke PPAPIBrokerInfoBarTest.Allowed test:
http://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%284%29/builds/24866/steps/browser_tests/logs/Allowed

> Use the same handle for checking and duplicating in DuplicateHandleProxy
> 
> BUG=338524
> R=cpu@chromium.org
> NOTRY=true
> 
> Review URL: https://codereview.chromium.org/136543008

TBR=jschuh@chromium.org

Review URL: https://codereview.chromium.org/160993002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250777 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250777