Don't leak fragment processor in SkColorFilter::asFragmentProcessors implementations.

src/effects/SkTableColorFilter.cpp

Index: src/effects/SkTableColorFilter.cpp
diff --git a/src/effects/SkTableColorFilter.cpp b/src/effects/SkTableColorFilter.cpp
index 27a5def5e527d8057c9f82f927bb8537625f0719..839b014c68c5bdf60fb5c3d5afe4068092cbc242 100644
--- a/src/effects/SkTableColorFilter.cpp
+++ b/src/effects/SkTableColorFilter.cpp
@@ -592,6 +592,9 @@ bool SkTable_ColorFilter::asFragmentProcessors(GrContext* context,
     if (frag) {
         if (array) {
             *array->append() = frag;
+        } else {
+            frag->unref();
+            SkDEBUGCODE(frag = NULL;)
         }
         return true;
     }