Added registerChild; transforms, textures, glKey automatically handled.

src/effects/gradients/SkSweepGradient.cpp

Index: src/effects/gradients/SkSweepGradient.cpp
diff --git a/src/effects/gradients/SkSweepGradient.cpp b/src/effects/gradients/SkSweepGradient.cpp
index c3278b23925fcdb61f82fca01da01e164ae900c2..4936d31505f5cb9097540cc48b338e3e18e65c91 100644
--- a/src/effects/gradients/SkSweepGradient.cpp
+++ b/src/effects/gradients/SkSweepGradient.cpp
@@ -214,11 +214,6 @@ public:
 
     const char* name() const override { return "Sweep Gradient"; }
 
-    virtual void getGLProcessorKey(const GrGLSLCaps& caps,
-                                   GrProcessorKeyBuilder* b) const override {
-        GrGLSweepGradient::GenKey(*this, caps, b);
-    }
-
     GrGLFragmentProcessor* createGLInstance() const override {
         return SkNEW_ARGS(GrGLSweepGradient, (*this));
     }
@@ -231,6 +226,12 @@ private:
     : INHERITED(ctx, procDataManager, shader, matrix, SkShader::kClamp_TileMode) {
         this->initClassID<GrSweepGradient>();
     }
+
+    virtual void onGetGLProcessorKey(const GrGLSLCaps& caps,
+                                     GrProcessorKeyBuilder* b) const override {
+        GrGLSweepGradient::GenKey(*this, caps, b);
+    }
+
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     typedef GrGradientEffect INHERITED;