Make addUniform take a precision

src/effects/gradients/SkTwoPointRadialGradient.cpp

Index: src/effects/gradients/SkTwoPointRadialGradient.cpp
diff --git a/src/effects/gradients/SkTwoPointRadialGradient.cpp b/src/effects/gradients/SkTwoPointRadialGradient.cpp
index 2783112cb8065f049a730ecb63d0ab06e2587cf7..4fb2996226f145efb638087232f105f7604e1469 100644
--- a/src/effects/gradients/SkTwoPointRadialGradient.cpp
+++ b/src/effects/gradients/SkTwoPointRadialGradient.cpp
@@ -566,7 +566,8 @@ void GrGLRadial2Gradient::emitCode(GrGLFPBuilder* builder,
     const GrRadial2Gradient& ge = fp.cast<GrRadial2Gradient>();
     this->emitUniforms(builder, ge);
     fParamUni = builder->addUniformArray(GrGLProgramBuilder::kFragment_Visibility,
-                                         kFloat_GrSLType, "Radial2FSParams", 6);
+                                         kFloat_GrSLType, kDefault_GrSLPrecision,
+                                         "Radial2FSParams", 6);
 
     SkString cName("c");
     SkString ac4Name("ac4");