Make all GrFragmentProcessors GL independent.

src/gpu/effects/GrSimpleTextureEffect.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrSimpleTextureEffect_DEFINED
 #define GrSimpleTextureEffect_DEFINED
 
@@ skipping 45 matching lines @@
     }
 
     GrSimpleTextureEffect(GrTexture* texture,
                           const SkMatrix& matrix,
                           const GrTextureParams& params,
                           GrCoordSet coordSet)
         : GrSingleTextureEffect(texture, matrix, params, coordSet) {
         this->initClassID<GrSimpleTextureEffect>();
     }
 
-    GrGLFragmentProcessor* onCreateGLInstance() const override;
+    GrGLSLFragmentProcessor* onCreateGLInstance() const override;
 
     void onGetGLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const override;
 
     bool onIsEqual(const GrFragmentProcessor& other) const override { return true; }
 
     void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
 
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     typedef GrSingleTextureEffect INHERITED;
 };
 
 #endif