Move a unit test from Source/web to Source/modules, fix modules tests

I moved the test, but then it wasn't being built into the
webkit_unit_tests binary any more. It looks like references to the
modules_ and bindings_ unittest_files weren't being pulled in in the
same way as core_ and web_ in the component build.

NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/19834002

git-svn-id: svn://svn.chromium.org/blink/trunk@154595 bbb929c8-8fbe-4397-9dbb-9b2b20218538