Add initialization for a member variable.

TEST=None
BUG=None
TBR=huanr
Review URL: http://codereview.chromium.org/2283004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@48363 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed