2D kernel initial wiring for Guassian

src/gpu/effects/GrMatrixConvolutionEffect.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 GrMatrixConvolutionEffect_DEFINED
 #define GrMatrixConvolutionEffect_DEFINED
 
@@ skipping 20 matching lines @@
         return SkNEW_ARGS(GrMatrixConvolutionEffect, (texture,
                                                       bounds,
                                                       kernelSize,
                                                       kernel,
                                                       gain,
                                                       bias,
                                                       kernelOffset,
                                                       tileMode,
                                                       convolveAlpha));
     }
+
+    static GrEffect* CreateGaussian(GrTexture* texture,
+                                    const SkIRect& bounds,
+                                    const SkISize& kernelSize,
+                                    SkScalar gain,
+                                    SkScalar bias,
+                                    const SkIPoint& kernelOffset,
+                                    GrTextureDomain::Mode tileMode,
+                                    bool convolveAlpha,
+                                    SkScalar sigmaX,
+                                    SkScalar sigmaY);
+
     virtual ~GrMatrixConvolutionEffect();
 
     virtual void getConstantColorComponents(GrColor* color,
                                             uint32_t* validFlags) const SK_OVERRIDE {
         // TODO: Try to do better?
         *validFlags = 0;
     }
 
     static const char* Name() { return "MatrixConvolution"; }
     const SkIRect& bounds() const { return fBounds; }
@@ skipping 17 matching lines @@
                               SkScalar gain,
                               SkScalar bias,
                               const SkIPoint& kernelOffset,
                               GrTextureDomain::Mode tileMode,
                               bool convolveAlpha);
 
     virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE;
 
     SkIRect         fBounds;
     SkISize         fKernelSize;
-    float*          fKernel;
+    float           fKernel[MAX_KERNEL_SIZE];
     float           fGain;
     float           fBias;
     float           fKernelOffset[2];
     bool            fConvolveAlpha;
     GrTextureDomain fDomain;
 
     GR_DECLARE_EFFECT_TEST;
 
     typedef GrSingleTextureEffect INHERITED;
 };
 
 #endif