Fix definition of isEqual() for two gradient effect custom stages.
Expand comments defining isEqual() to better distinguish equality from
equivalence, which is more significant in Ganesh shader cache management.

http://codereview.appspot.com/6379043/



git-svn-id: http://skia.googlecode.com/svn/trunk@4484 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed