use Descriptor struct to encapsulate all the common paramaeters between our various gradient types.…

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 3fce9c441c01a33bc2d4f1ac96b484d6552ba29e..f60d71078af364ed2d60a785dac85c984ec9b039 100644
--- a/src/effects/gradients/SkRadialGradient.cpp
+++ b/src/effects/gradients/SkRadialGradient.cpp
@@ -153,9 +153,8 @@ void shadeSpan16_radial_repeat(SkScalar sfx, SkScalar sdx,
 /////////////////////////////////////////////////////////////////////
 
 SkRadialGradient::SkRadialGradient(const SkPoint& center, SkScalar radius,
-                const SkColor colors[], const SkScalar pos[], int colorCount,
-                SkShader::TileMode mode, SkUnitMapper* mapper)
-    : SkGradientShaderBase(colors, pos, colorCount, mode, mapper),
+                const Descriptor& desc)
+    : SkGradientShaderBase(desc),
       fCenter(center),
       fRadius(radius)
 {