Create fragment processor for performing input color blend with child processor

src/gpu/effects/GrPorterDuffXferProcessor.cpp

Index: src/gpu/effects/GrPorterDuffXferProcessor.cpp
diff --git a/src/gpu/effects/GrPorterDuffXferProcessor.cpp b/src/gpu/effects/GrPorterDuffXferProcessor.cpp
index 4c50e47ab9ae1d3845fb603a4f8d42c639a7cbff..1312d353351d1bf9eaba46395712fac5cd01e052 100644
--- a/src/gpu/effects/GrPorterDuffXferProcessor.cpp
+++ b/src/gpu/effects/GrPorterDuffXferProcessor.cpp
@@ -13,7 +13,7 @@
 #include "GrProcOptInfo.h"
 #include "GrTypes.h"
 #include "GrXferProcessor.h"
-#include "gl/GrGLBlend.h"
+#include "gl/GrGLSLBlend.h"
 #include "gl/GrGLXferProcessor.h"
 #include "gl/builders/GrGLFragmentShaderBuilder.h"
 #include "gl/builders/GrGLProgramBuilder.h"
@@ -547,7 +547,7 @@ private:
         const ShaderPDXferProcessor& xp = proc.cast<ShaderPDXferProcessor>();
         GrGLXPFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder();
 
-        GrGLBlend::AppendPorterDuffBlend(fsBuilder, srcColor, dstColor, outColor, xp.getXfermode());
+        GrGLSLBlend::AppendMode(fsBuilder, srcColor, dstColor, outColor, xp.getXfermode());
     }
 
     void onSetData(const GrGLProgramDataManager&, const GrXferProcessor&) override {}
@@ -651,7 +651,7 @@ GrXferProcessor* PDLCDXferProcessor::Create(SkXfermode::Mode xfermode,
         return nullptr;
     }
 
-    GrColor blendConstant = GrUnPreMulColor(colorPOI.color());
+    GrColor blendConstant = GrUnpremulColor(colorPOI.color());
     uint8_t alpha = GrColorUnpackA(blendConstant);
     blendConstant |= (0xff << GrColor_SHIFT_A);