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

Committed: https://skia.googlesource.com/skia/+/ecfdc251be71f3d634e76afdd6375bf55fc061aa

Review URL: https://codereview.chromium.org/1316513002
diff --git a/src/effects/SkLightingImageFilter.cpp b/src/effects/SkLightingImageFilter.cpp
index dd56751..240a693 100644
--- a/src/effects/SkLightingImageFilter.cpp
+++ b/src/effects/SkLightingImageFilter.cpp
@@ -1633,7 +1633,7 @@
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrDiffuseLightingEffect);
 
-GrFragmentProcessor* GrDiffuseLightingEffect::TestCreate(GrProcessorTestData* d) {
+const GrFragmentProcessor* GrDiffuseLightingEffect::TestCreate(GrProcessorTestData* d) {
     SkScalar surfaceScale = d->fRandom->nextSScalar1();
     SkScalar kd = d->fRandom->nextUScalar1();
     SkAutoTUnref<SkImageFilterLight> light(create_random_light(d->fRandom));
@@ -1836,7 +1836,7 @@
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrSpecularLightingEffect);
 
-GrFragmentProcessor* GrSpecularLightingEffect::TestCreate(GrProcessorTestData* d) {
+const GrFragmentProcessor* GrSpecularLightingEffect::TestCreate(GrProcessorTestData* d) {
     SkScalar surfaceScale = d->fRandom->nextSScalar1();
     SkScalar ks = d->fRandom->nextUScalar1();
     SkScalar shininess = d->fRandom->nextUScalar1();