Remove tab parameter from GrGLSLMulVarBy4f function

src/gpu/effects/GrConvolutionEffect.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "GrConvolutionEffect.h"
 #include "gl/GrGLProcessor.h"
@@ skipping 83 matching lines @@
             const char* bounds = builder->getUniformCStr(fBoundsUni);
             const char* component = this->direction() == Gr1DKernelEffect::kY_Direction ? "y" : "x";
             fsBuilder->codeAppendf(" * float(coord.%s >= %s.x && coord.%s <= %s.y)",
                 component, bounds, component, bounds);
         }
         fsBuilder->codeAppendf(" * %s;\n", kernelIndex.c_str());
         fsBuilder->codeAppendf("\t\tcoord += %s;\n", imgInc);
     }
 
     SkString modulate;
-    GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor);
+    GrGLSLMulVarBy4f(&modulate, outputColor, inputColor);
     fsBuilder->codeAppend(modulate.c_str());
 }
 
 void GrGLConvolutionEffect::setData(const GrGLProgramDataManager& pdman,
                                     const GrProcessor& processor) {
     const GrConvolutionEffect& conv = processor.cast<GrConvolutionEffect>();
     GrTexture& texture = *conv.texture(0);
     // the code we generated was for a specific kernel radius
     SkASSERT(conv.radius() == fRadius);
     float imageIncrement[2] = { 0 };
@@ skipping 117 matching lines @@
     }
 
     bool useBounds = random->nextBool();
     return GrConvolutionEffect::Create(textures[texIdx],
                                        dir,
                                        radius,
                                        kernel,
                                        useBounds,
                                        bounds);
 }