Remove two declarations for functions whose definitions were removed in r170842.

BUG=none
TEST=none
TBR=sky

Review URL: https://codereview.chromium.org/26570002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227573 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227573