Part2: Fix a recently introduced (r230246 in m32) use-after-free bug.

BUG=327366

Review URL: https://codereview.chromium.org/118503003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241989 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241989