Retire SkShader::kSupports4f_Flag

tests/SkColor4fTest.cpp

Index: tests/SkColor4fTest.cpp
diff --git a/tests/SkColor4fTest.cpp b/tests/SkColor4fTest.cpp
index ea9a80f134f3f4120fa4d68da5361266af7b0d56..c9656b9b2a0f3933f1d93a04e68d2aa391c37f92 100644
--- a/tests/SkColor4fTest.cpp
+++ b/tests/SkColor4fTest.cpp
@@ -157,8 +157,7 @@ DEF_TEST(Color4f_shader, reporter) {
                                               SkShader::ContextRec::kPM4f_DstType);
         SkASSERT(paint.getShader()->contextSize(contextRec) <= sizeof(storage));
         SkShader::Context* ctx = paint.getShader()->createContext(contextRec, storage);
-        REPORTER_ASSERT(reporter, ctx->supports4f() == rec.fSupports4f);
-        if (ctx->supports4f()) {
+        if (rec.fSupports4f) {

[reed1, 2016/02/24 03:01:13]

I think we can even skip this, since all shaders "support" it, knowingly or
otherwise. That said, fine if we want to keep this for now.

             const int N = 100;
             SkPM4f buffer4f[N];
             ctx->shadeSpan4f(0, 0, buffer4f, N);