Remove tab parameter from GrGLSLMulVarBy4f function

src/gpu/effects/GrMatrixConvolutionEffect.cpp

 /*
  * Copyright 2014 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 "GrMatrixConvolutionEffect.h"
 #include "gl/GrGLProcessor.h"
 #include "gl/GrGLSL.h"
@@ skipping 98 matching lines @@
         fsBuilder->codeAppendf("%s.rgb = clamp(%s.rgb, 0.0, %s.a);",
                                outputColor, outputColor, outputColor);
     } else {
         fDomain.sampleTexture(fsBuilder, domain, "c", coords2D, samplers[0]);
         fsBuilder->codeAppendf("%s.a = c.a;", outputColor);
         fsBuilder->codeAppendf("%s.rgb = sum.rgb * %s + %s;", outputColor, gain, bias);
         fsBuilder->codeAppendf("%s.rgb *= %s.a;", outputColor, outputColor);
     }
 
     SkString modulate;
-    GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor);
+    GrGLSLMulVarBy4f(&modulate, outputColor, inputColor);
     fsBuilder->codeAppend(modulate.c_str());
 }
 
 void GrGLMatrixConvolutionEffect::GenKey(const GrProcessor& processor,
                                          const GrGLCaps&, GrProcessorKeyBuilder* b) {
     const GrMatrixConvolutionEffect& m = processor.cast<GrMatrixConvolutionEffect>();
     SkASSERT(m.kernelSize().width() <= 0x7FFF && m.kernelSize().height() <= 0xFFFF);
     uint32_t key = m.kernelSize().width() << 16 | m.kernelSize().height();
     key |= m.convolveAlpha() ? 1 << 31 : 0;
     b->add32(key);
@@ skipping 137 matching lines @@
     return GrMatrixConvolutionEffect::Create(textures[texIdx],
                                              bounds,
                                              kernelSize,
                                              kernel.get(),
                                              gain,
                                              bias,
                                              kernelOffset,
                                              tileMode,
                                              convolveAlpha);
 }