Added tree structure to GrGLFragmentProcessor, i.e. GL instances

src/effects/SkArithmeticMode_gpu.cpp

Index: src/effects/SkArithmeticMode_gpu.cpp
diff --git a/src/effects/SkArithmeticMode_gpu.cpp b/src/effects/SkArithmeticMode_gpu.cpp
index 08851cb7bd3c7ff0c2e5c6a53ab2501c94d02fed..39814e2eb2776e78f0ae585f2c235c55eb38ee5b 100644
--- a/src/effects/SkArithmeticMode_gpu.cpp
+++ b/src/effects/SkArithmeticMode_gpu.cpp
@@ -77,18 +77,19 @@ public:
                             fEnforcePMColor);
     }
 
-    void setData(const GrGLProgramDataManager& pdman, const GrProcessor& proc) override {
-        const GrArithmeticFP& arith = proc.cast<GrArithmeticFP>();
-        pdman.set4f(fKUni, arith.k1(), arith.k2(), arith.k3(), arith.k4());
-        fEnforcePMColor = arith.enforcePMColor();
-    }
-
     static void GenKey(const GrProcessor& proc, const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) {
         const GrArithmeticFP& arith = proc.cast<GrArithmeticFP>();
         uint32_t key = arith.enforcePMColor() ? 1 : 0;
         b->add32(key);
     }
 
+protected:
+    void onSetData(const GrGLProgramDataManager& pdman, const GrProcessor& proc) override {
+        const GrArithmeticFP& arith = proc.cast<GrArithmeticFP>();
+        pdman.set4f(fKUni, arith.k1(), arith.k2(), arith.k3(), arith.k4());
+        fEnforcePMColor = arith.enforcePMColor();
+    }
+
 private:
     GrGLProgramDataManager::UniformHandle fKUni;
     bool fEnforcePMColor;
@@ -116,7 +117,7 @@ void GrArithmeticFP::onGetGLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyB
     GLArithmeticFP::GenKey(*this, caps, b);
 }
 
-GrGLFragmentProcessor* GrArithmeticFP::createGLInstance() const {
+GrGLFragmentProcessor* GrArithmeticFP::onCreateGLInstance() const {
     return SkNEW_ARGS(GLArithmeticFP, (*this));
 }