Make GrGLSLProgramBuilder base class for ProgramBuilder

src/effects/gradients/SkSweepGradient.cpp

Index: src/effects/gradients/SkSweepGradient.cpp
diff --git a/src/effects/gradients/SkSweepGradient.cpp b/src/effects/gradients/SkSweepGradient.cpp
index 35d2f746201f2c1e0ba95b394b3e79b3db8c5950..172c7d152ab1bf3b6600a94ae35647ecd7198157 100644
--- a/src/effects/gradients/SkSweepGradient.cpp
+++ b/src/effects/gradients/SkSweepGradient.cpp
@@ -250,16 +250,15 @@ void GrGLSweepGradient::emitCode(EmitArgs& args) {
     this->emitUniforms(args.fBuilder, ge);
     SkString coords2D = args.fBuilder->getFragmentShaderBuilder()
                                         ->ensureFSCoords2D(args.fCoords, 0);
-    const GrGLContextInfo& ctxInfo = args.fBuilder->ctxInfo();
     SkString t;
     // 0.1591549430918 is 1/(2*pi), used since atan returns values [-pi, pi]
     // On Intel GPU there is an issue where it reads the second arguement to atan "- %s.x" as an int
     // thus must us -1.0 * %s.x to work correctly
-    if (kIntel_GrGLVendor != ctxInfo.vendor()){
-        t.printf("atan(- %s.y, - %s.x) * 0.1591549430918 + 0.5",
+    if (args.fBuilder->glslCaps()->mustForceNegatedAtanParamToFloat()){
+        t.printf("atan(- %s.y, -1.0 * %s.x) * 0.1591549430918 + 0.5",
                  coords2D.c_str(), coords2D.c_str());
     } else {
-        t.printf("atan(- %s.y, -1.0 * %s.x) * 0.1591549430918 + 0.5",
+        t.printf("atan(- %s.y, - %s.x) * 0.1591549430918 + 0.5",
                  coords2D.c_str(), coords2D.c_str());
     }
     this->emitColor(args.fBuilder, ge, t.c_str(), args.fOutputColor, args.fInputColor,