Add ContextRec param to SkShader::contextSize()

src/effects/gradients/SkRadialGradient.cpp

Index: src/effects/gradients/SkRadialGradient.cpp
diff --git a/src/effects/gradients/SkRadialGradient.cpp b/src/effects/gradients/SkRadialGradient.cpp
index 020c25ec46cd95005c8644e29c84b5aa72733a91..466ae045a5bbb9c896dead805727ca646f8c6719 100644
--- a/src/effects/gradients/SkRadialGradient.cpp
+++ b/src/effects/gradients/SkRadialGradient.cpp
@@ -40,7 +40,7 @@ SkRadialGradient::SkRadialGradient(const SkPoint& center, SkScalar radius, const
     , fRadius(radius) {
 }
 
-size_t SkRadialGradient::contextSize() const {
+size_t SkRadialGradient::contextSize(const ContextRec&) const {
     return sizeof(RadialGradientContext);
 }