Coverity: Initialize member variables.

      CID_COUNT=4
CID=104409,104410,104411,104412
BUG=none
TEST=none
R=groby
TBR=sky,hans,darin


Review URL: https://chromiumcodereview.appspot.com/10703108

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@145880 0039d316-1c4b-4281-b951-d872f2087c98