Add a requiresVertexShader method to GrGLEffect

src/gpu/effects/GrBezierEffect.cpp

Index: src/gpu/effects/GrBezierEffect.cpp
diff --git a/src/gpu/effects/GrBezierEffect.cpp b/src/gpu/effects/GrBezierEffect.cpp
index 0d57b107acdfb2b784f53385fd08bd6ec3da7d59..a55ceabc4dd283901fa1952a39b44f7a48b9d201 100644
--- a/src/gpu/effects/GrBezierEffect.cpp
+++ b/src/gpu/effects/GrBezierEffect.cpp
@@ -15,6 +15,8 @@ class GrGLConicEffect : public GrGLEffect {
 public:
     GrGLConicEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
 
+    virtual bool requiresVertexShader(const GrDrawEffect&) const SK_OVERRIDE { return true; }
+
     virtual void emitCode(GrGLShaderBuilder* builder,
                           const GrDrawEffect& drawEffect,
                           EffectKey key,
@@ -158,6 +160,8 @@ class GrGLQuadEffect : public GrGLEffect {
 public:
     GrGLQuadEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
 
+    virtual bool requiresVertexShader(const GrDrawEffect&) const SK_OVERRIDE { return true; }
+
     virtual void emitCode(GrGLShaderBuilder* builder,
                           const GrDrawEffect& drawEffect,
                           EffectKey key,
@@ -290,6 +294,8 @@ class GrGLCubicEffect : public GrGLEffect {
 public:
     GrGLCubicEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
 
+    virtual bool requiresVertexShader(const GrDrawEffect&) const SK_OVERRIDE { return true; }
+
     virtual void emitCode(GrGLShaderBuilder* builder,
                           const GrDrawEffect& drawEffect,
                           EffectKey key,