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

src/effects/SkColorFilters.cpp

Index: src/effects/SkColorFilters.cpp
diff --git a/src/effects/SkColorFilters.cpp b/src/effects/SkColorFilters.cpp
index c38328ccbbd8317c7e36e8e67cf29ddab274d512..c3fa730d006ca0e30020aa3c20c53cd49b762e80 100644
--- a/src/effects/SkColorFilters.cpp
+++ b/src/effects/SkColorFilters.cpp
@@ -339,7 +339,7 @@
 }
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(ModeColorFilterEffect);
-const GrFragmentProcessor* ModeColorFilterEffect::TestCreate(GrProcessorTestData* d) {
+GrFragmentProcessor* ModeColorFilterEffect::TestCreate(GrProcessorTestData* d) {
     SkXfermode::Mode mode = SkXfermode::kDst_Mode;
     while (SkXfermode::kDst_Mode == mode) {
         mode = static_cast<SkXfermode::Mode>(d->fRandom->nextRangeU(0, SkXfermode::kLastCoeffMode));