Revert 273548 "Blink roll 174973:175011"
Possible cause of leak in PhishingDOMFeatureExtractorTest.ScriptAndImageFeatures.
http://build.chromium.org/p/chromium.memory/builders/Linux%20ASan%20LSan%20Tests%20%281%29/builds/2642/steps/browser_tests/logs/ScriptAndImageFeatures
> Blink roll 174973:175011
>
> http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=174974:175011&mode=html
> TBR=esprehn@chromium.org,mvanouwerkerk@chromium.org,eseidel@chromium.org
> BUG=
>
> Review URL: https://codereview.chromium.org/
305823002
TBR=eseidel@chromium.org
Review URL: https://codereview.chromium.org/
306983002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@273616 0039d316-1c4b-4281-b951-d872f2087c98