Make addUniform take a precision

src/effects/SkTableColorFilter.cpp

Index: src/effects/SkTableColorFilter.cpp
diff --git a/src/effects/SkTableColorFilter.cpp b/src/effects/SkTableColorFilter.cpp
index db25a6fa0475f1bec7de1b56059b84971db46a7f..942bae7d06361d2b136cda1bcff482eab71dcc22 100644
--- a/src/effects/SkTableColorFilter.cpp
+++ b/src/effects/SkTableColorFilter.cpp
@@ -343,7 +343,8 @@ void GLColorTableEffect::emitCode(GrGLFPBuilder* builder,
                                   const TextureSamplerArray& samplers) {
     const char* yoffsets;
     fRGBAYValuesUni = builder->addUniform(GrGLFPBuilder::kFragment_Visibility,
-                                          kVec4f_GrSLType, "yoffsets", &yoffsets);
+                                          kVec4f_GrSLType, kDefault_GrSLPrecision,
+                                          "yoffsets", &yoffsets);
     static const float kColorScaleFactor = 255.0f / 256.0f;
     static const float kColorOffsetFactor = 1.0f / 512.0f;
     GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();