Revert of https://codereview.chromium.org/80633002/
Reason for revert: Causes memory leaks, see crbug.com/323377

ISSUE=323377
TBR=yoichio@chromium.org,yukawa@chromium.org,komatsu@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/86943003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237227 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237227