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

src/effects/SkColorMatrixFilter.cpp

Index: src/effects/SkColorMatrixFilter.cpp
diff --git a/src/effects/SkColorMatrixFilter.cpp b/src/effects/SkColorMatrixFilter.cpp
index 8dc603042c9e10a2c0fc142533ebaedcd4877cd2..92b26ebdf91ec901d1dc8bb44baff073288edb1c 100644
--- a/src/effects/SkColorMatrixFilter.cpp
+++ b/src/effects/SkColorMatrixFilter.cpp
@@ -526,7 +526,7 @@ private:
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(ColorMatrixEffect);
 
-GrFragmentProcessor* ColorMatrixEffect::TestCreate(GrProcessorTestData* d) {
+const GrFragmentProcessor* ColorMatrixEffect::TestCreate(GrProcessorTestData* d) {
     SkColorMatrix colorMatrix;
     for (size_t i = 0; i < SK_ARRAY_COUNT(colorMatrix.fMat); ++i) {
         colorMatrix.fMat[i] = d->fRandom->nextSScalar1();