Revert of removing GrDrawEffect

src/gpu/effects/GrDitherEffect.cpp

Index: src/gpu/effects/GrDitherEffect.cpp
diff --git a/src/gpu/effects/GrDitherEffect.cpp b/src/gpu/effects/GrDitherEffect.cpp
index 35726fdea7f5d92942eaa2f65b4ca51f133e7d43..443df9ed362991b49b78c0c57002dbd65ed0392f 100644
--- a/src/gpu/effects/GrDitherEffect.cpp
+++ b/src/gpu/effects/GrDitherEffect.cpp
@@ -68,10 +68,10 @@
 
 class GLDitherEffect : public GrGLEffect {
 public:
-    GLDitherEffect(const GrBackendEffectFactory&, const GrEffect&);
+    GLDitherEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
 
     virtual void emitCode(GrGLProgramBuilder* builder,
-                          const GrEffect& effect,
+                          const GrDrawEffect& drawEffect,
                           const GrEffectKey& key,
                           const char* outputColor,
                           const char* inputColor,
@@ -83,12 +83,12 @@
 };
 
 GLDitherEffect::GLDitherEffect(const GrBackendEffectFactory& factory,
-                               const GrEffect& effect)
+                               const GrDrawEffect& drawEffect)
     : INHERITED (factory) {
 }
 
 void GLDitherEffect::emitCode(GrGLProgramBuilder* builder,
-                              const GrEffect& effect,
+                              const GrDrawEffect& drawEffect,
                               const GrEffectKey& key,
                               const char* outputColor,
                               const char* inputColor,