Implement color filter as GrGLEffect

src/gpu/gl/GrGLProgram.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrGLProgram_DEFINED
 #define GrGLProgram_DEFINED
@@ skipping 118 matching lines @@
                  SharedGLState*);
 
 private:
     typedef GrGLUniformManager::UniformHandle UniformHandle;
 
     // handles for uniforms (aside from per-effect samplers)
     struct UniformHandles {
         UniformHandle       fViewMatrixUni;
         UniformHandle       fColorUni;
         UniformHandle       fCoverageUni;
-        UniformHandle       fColorFilterUni;
 
         // We use the render target height to provide a y-down frag coord when specifying
         // origin_upper_left is not supported.
         UniformHandle       fRTHeightUni;
 
         // Uniforms for computing texture coords to do the dst-copy lookup
         UniformHandle       fDstCopyTopLeftUni;
         UniformHandle       fDstCopyScaleUni;
         UniformHandle       fDstCopySamplerUni;
     };
@@ skipping 40 matching lines @@
     // Helper for setData() that sets the view matrix and loads the render target height uniform
     void setMatrixAndRenderTargetHeight(const GrDrawState&);
 
     // GL program ID
     GrGLuint                    fProgramID;
 
     // these reflect the current values of uniforms (GL uniform values travel with program)
     MatrixState                 fMatrixState;
     GrColor                     fColor;
     GrColor                     fCoverage;
-    GrColor                     fColorFilterColor;
     int                         fDstCopyTexUnit;
 
     SkTArray<EffectAndSamplers> fColorEffects;
     SkTArray<EffectAndSamplers> fCoverageEffects;
 
     GrGLProgramDesc             fDesc;
     GrGpuGL*                    fGpu;
 
     GrGLUniformManager          fUniformManager;
     UniformHandles              fUniformHandles;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif