Breaking out full program and frag only

src/gpu/gl/builders/GrGLFragmentOnlyProgramBuilder.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrGLFragmentOnlyProgramBuilder_DEFINED
+#define GrGLFragmentOnlyProgramBuilder_DEFINED
+
+#include "GrGLProgramBuilder.h"
+
+class GrGLFragmentOnlyProgramBuilder : public GrGLProgramBuilder {
+public:
+    GrGLFragmentOnlyProgramBuilder(GrGpuGL*, const GrGLProgramDesc&);
+
+    int addTexCoordSets(int count);
+
+private:
+    virtual void emitCodeBeforeEffects(GrGLSLExpr4* color,
+                                       GrGLSLExpr4* coverage) SK_OVERRIDE {}
+
+    virtual void emitGeometryProcessor(const GrEffectStage* geometryProcessor,
+                                       GrGLSLExpr4* coverage) SK_OVERRIDE {
+        SkASSERT(NULL == geometryProcessor);
+    }
+
+    virtual GrGLProgramEffects* createAndEmitEffects(const GrEffectStage* effectStages[],
+                                                     int effectCnt,
+                                                     const GrGLProgramDesc::EffectKeyProvider&,
+                                                     GrGLSLExpr4* inOutFSColor) SK_OVERRIDE;
+
+    virtual void emitCodeAfterEffects() SK_OVERRIDE {}
+
+    typedef GrGLProgramBuilder INHERITED;
+};
+
+#endif