Refactor various gradient effect classes

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 a3afe5afc9b1faf9f455b36f3c9e429810919f4c..78ecffae1a003b66196918dfcd3a4cc0be7f65c9 100644
--- a/src/effects/gradients/SkRadialGradient.cpp
+++ b/src/effects/gradients/SkRadialGradient.cpp
@@ -242,28 +242,10 @@ void SkRadialGradient::RadialGradientContext::shadeSpan(int x, int y,
 #include "glsl/GrGLSLCaps.h"
 #include "glsl/GrGLSLFragmentShaderBuilder.h"
 
-class GrGLRadialGradient : public GrGLGradientEffect {
-public:
-
-    GrGLRadialGradient(const GrProcessor&) {}
-    virtual ~GrGLRadialGradient() { }
-
-    virtual void emitCode(EmitArgs&) override;
-
-    static void GenKey(const GrProcessor& processor, const GrGLSLCaps&, GrProcessorKeyBuilder* b) {
-        b->add32(GenBaseGradientKey(processor));
-    }
-
-private:
-
-    typedef GrGLGradientEffect INHERITED;
-
-};
-
-/////////////////////////////////////////////////////////////////////
-
 class GrRadialGradient : public GrGradientEffect {
 public:
+    class GLSLRadialProcessor;
+
     static sk_sp<GrFragmentProcessor> Make(GrContext* ctx,
                                            const SkRadialGradient& shader,
                                            const SkMatrix& matrix,
@@ -284,14 +266,10 @@ private:
         this->initClassID<GrRadialGradient>();
     }
 
-    GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
-        return new GrGLRadialGradient(*this);
-    }
+    GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
 
     virtual void onGetGLSLProcessorKey(const GrGLSLCaps& caps,
-                                       GrProcessorKeyBuilder* b) const override {
-        GrGLRadialGradient::GenKey(*this, caps, b);
-    }
+                                       GrProcessorKeyBuilder* b) const override;
 
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
@@ -300,6 +278,35 @@ private:
 
 /////////////////////////////////////////////////////////////////////
 
+class GrRadialGradient::GLSLRadialProcessor : public GrGradientEffect::GLSLProcessor {
+public:
+    GLSLRadialProcessor(const GrProcessor&) {}
+    virtual ~GLSLRadialProcessor() { }
+
+    virtual void emitCode(EmitArgs&) override;
+
+    static void GenKey(const GrProcessor& processor, const GrGLSLCaps&, GrProcessorKeyBuilder* b) {
+        b->add32(GenBaseGradientKey(processor));
+    }
+
+private:
+    typedef GrGradientEffect::GLSLProcessor INHERITED;
+
+};
+
+/////////////////////////////////////////////////////////////////////
+
+GrGLSLFragmentProcessor* GrRadialGradient::onCreateGLSLInstance() const {
+    return new GrRadialGradient::GLSLRadialProcessor(*this);
+}
+
+void GrRadialGradient::onGetGLSLProcessorKey(const GrGLSLCaps& caps,
+                                             GrProcessorKeyBuilder* b) const {
+    GrRadialGradient::GLSLRadialProcessor::GenKey(*this, caps, b);
+}
+
+/////////////////////////////////////////////////////////////////////
+
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrRadialGradient);
 
 sk_sp<GrFragmentProcessor> GrRadialGradient::TestCreate(GrProcessorTestData* d) {
@@ -322,7 +329,7 @@ sk_sp<GrFragmentProcessor> GrRadialGradient::TestCreate(GrProcessorTestData* d)
 
 /////////////////////////////////////////////////////////////////////
 
-void GrGLRadialGradient::emitCode(EmitArgs& args) {
+void GrRadialGradient::GLSLRadialProcessor::emitCode(EmitArgs& args) {
     const GrRadialGradient& ge = args.fFp.cast<GrRadialGradient>();
     this->emitUniforms(args.fUniformHandler, ge);
     SkString t("length(");