Add ContextRec param to SkShader::contextSize()

tests/SkColor4fTest.cpp

Index: tests/SkColor4fTest.cpp
diff --git a/tests/SkColor4fTest.cpp b/tests/SkColor4fTest.cpp
index 5700e4b79c347caa7e6d71fc17e6c04a818fa9ce..1149734f6f4c779e8c44b7b8328b5008e950516d 100644
--- a/tests/SkColor4fTest.cpp
+++ b/tests/SkColor4fTest.cpp
@@ -148,9 +148,13 @@ DEF_TEST(Color4f_shader, reporter) {
     for (const auto& rec : recs) {
         uint32_t storage[200];
         paint.setShader(rec.fFact())->unref();
-        SkASSERT(paint.getShader()->contextSize() <= sizeof(storage));
-        SkShader::Context* ctx = paint.getShader()->createContext({paint, SkMatrix::I(), nullptr},
-                                                                  storage);
+        // Claim F16 to encourage 4f context selection. At some point we may need
+        // to instantiate two separate contexts for optimal 4b/4f selection.
+        const SkShader::ContextRec contextRec(paint, SkMatrix::I(), nullptr,
+                                              kRGBA_F16_SkColorType,
+                                              kLinear_SkColorProfileType);
+        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()) {
             const int N = 100;