Drive-by comment fix in base/bind_unittest.nc.

Of course, no-compile tests are all disabled (since 2011) and bitrotted....

But at least this comment will be coherent.

TBR=ajwong@chromium.org

Review URL: https://codereview.chromium.org/175283003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252575 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252575