Fifth attempt to land faster rect blur. Remove unnecessary conditionals from the shader.

src/gpu/gl/GrGLShaderBuilder.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/GrGLShaderBuilder.h"
 #include "gl/GrGLProgram.h"
 #include "gl/GrGLUniformHandle.h"
@@ skipping 198 matching lines @@
     ///////////////////////////////////////////////////////////////////////////
     // write the secondary color output if necessary
     if (GrGLProgramDesc::CoverageOutputUsesSecondaryOutput(header.fCoverageOutput)) {
         const char* secondaryOutputName = this->enableSecondaryOutput();
 
         // default coeff to ones for kCoverage_DualSrcOutput
         GrGLSLExpr4 coeff(1);
         if (GrGLProgramDesc::kSecondaryCoverageISA_CoverageOutput == header.fCoverageOutput) {
             // Get (1-A) into coeff
             coeff = GrGLSLExpr4::VectorCast(GrGLSLExpr1(1) - inputColor.a());
-        } else if (GrGLProgramDesc::kSecondaryCoverageISC_CoverageOutput == 
+        } else if (GrGLProgramDesc::kSecondaryCoverageISC_CoverageOutput ==
                    header.fCoverageOutput){
             // Get (1-RGBA) into coeff
             coeff = GrGLSLExpr4(1) - inputColor;
         }
         // Get coeff * coverage into modulate and then write that to the dual source output.
         this->fsCodeAppendf("\t%s = %s;\n", secondaryOutputName, (coeff * inputCoverage).c_str());
     }
 
     ///////////////////////////////////////////////////////////////////////////
     // combine color and coverage as frag color
@@ skipping 863 matching lines @@
 
     GrGLPathTexGenProgramEffectsBuilder pathTexGenEffectsBuilder(this,
                                                                  effectCnt);
     this->INHERITED::createAndEmitEffects(&pathTexGenEffectsBuilder,
                                           effectStages,
                                           effectKeys,
                                           effectCnt,
                                           inOutFSColor);
     return pathTexGenEffectsBuilder.finish();
 }