Revert of Change SkShader;asFragmentProcessor signature to no longer take skpaint\grcolor*

src/gpu/effects/GrCustomXfermode.cpp

Index: src/gpu/effects/GrCustomXfermode.cpp
diff --git a/src/gpu/effects/GrCustomXfermode.cpp b/src/gpu/effects/GrCustomXfermode.cpp
index f626e7a2111dea73d7dc424f7a6e58572a1daa7a..58591e581062f8f2cd29319d4d3f8e5958935f5d 100644
--- a/src/gpu/effects/GrCustomXfermode.cpp
+++ b/src/gpu/effects/GrCustomXfermode.cpp
@@ -506,7 +506,7 @@
 }
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrCustomXferFP);
-const GrFragmentProcessor* GrCustomXferFP::TestCreate(GrProcessorTestData* d) {
+GrFragmentProcessor* GrCustomXferFP::TestCreate(GrProcessorTestData* d) {
     int mode = d->fRandom->nextRangeU(SkXfermode::kLastCoeffMode + 1, SkXfermode::kLastSeparableMode);
 
     return new GrCustomXferFP(d->fProcDataManager, static_cast<SkXfermode::Mode>(mode),
@@ -805,7 +805,7 @@
 }
 
 GR_DEFINE_XP_FACTORY_TEST(GrCustomXPFactory);
-const GrXPFactory* GrCustomXPFactory::TestCreate(GrProcessorTestData* d) {
+GrXPFactory* GrCustomXPFactory::TestCreate(GrProcessorTestData* d) {
     int mode = d->fRandom->nextRangeU(SkXfermode::kLastCoeffMode + 1,
                                       SkXfermode::kLastSeparableMode);