Revert of Remove gpu shader optimatization for solid white or trans black colors

src/gpu/gl/GrGLShaderBuilder.cpp

Index: src/gpu/gl/GrGLShaderBuilder.cpp
diff --git a/src/gpu/gl/GrGLShaderBuilder.cpp b/src/gpu/gl/GrGLShaderBuilder.cpp
index d0c35b3b731554ae571a25c15a37094297ba1319..4b7de027936df1debe1adc44f1b74fc6c24a26d1 100644
--- a/src/gpu/gl/GrGLShaderBuilder.cpp
+++ b/src/gpu/gl/GrGLShaderBuilder.cpp
@@ -164,6 +164,10 @@
             this->addUniform(GrGLShaderBuilder::kFragment_Visibility, kVec4f_GrSLType, "Color",
                              &name);
         inputColor = GrGLSLExpr4(name);
+    } else if (GrGLProgramDesc::kSolidWhite_ColorInput == header.fColorInput) {
+        inputColor = GrGLSLExpr4(1);
+    } else if (GrGLProgramDesc::kTransBlack_ColorInput == header.fColorInput) {
+        inputColor = GrGLSLExpr4(0);
     }
 
     if (GrGLProgramDesc::kUniform_ColorInput == header.fCoverageInput) {
@@ -174,6 +178,8 @@
         inputCoverage = GrGLSLExpr4(name);
     } else if (GrGLProgramDesc::kSolidWhite_ColorInput == header.fCoverageInput) {
         inputCoverage = GrGLSLExpr4(1);
+    } else if (GrGLProgramDesc::kTransBlack_ColorInput == header.fCoverageInput) {
+        inputCoverage = GrGLSLExpr4(0);
     }
 
     if (k110_GrGLSLGeneration != fGpu->glslGeneration()) {