Added optional "ambiguous" outgoing argument to XRay queries so that
calling code may choose different y-coordinates for better robustness.
Tested and verified manually inside O3D.

BUG=none
TEST=none

Review URL: http://codereview.appspot.com/1695051


git-svn-id: http://skia.googlecode.com/svn/trunk@586 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed