Added conical gradient to gm gradients test, and added two variants of that test, one with perspective applied to the local matrices of the gradients and the other with perspective applied to the overall view matrix.

Will require GM rebaselining.
Review URL: https://codereview.appspot.com/6344091

git-svn-id: http://skia.googlecode.com/svn/trunk@4468 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed