Add sampler precision to GrTextureAccess

src/gpu/glsl/GrGLSLProgramBuilder.cpp

Index: src/gpu/glsl/GrGLSLProgramBuilder.cpp
diff --git a/src/gpu/glsl/GrGLSLProgramBuilder.cpp b/src/gpu/glsl/GrGLSLProgramBuilder.cpp
index bc0208321cbc3e2ae1ad330b41342185f98975e5..7116d193f4609aab97dc0764206e4e748b8574e8 100644
--- a/src/gpu/glsl/GrGLSLProgramBuilder.cpp
+++ b/src/gpu/glsl/GrGLSLProgramBuilder.cpp
@@ -240,7 +240,7 @@ void GrGLSLProgramBuilder::emitSamplers(const GrProcessor& processor,
         name.printf("Sampler%d", t);
         localSamplerUniforms[t] = this->uniformHandler()->addUniform(access.getVisibility(),
                                                                      samplerType,
-                                                                     kDefault_GrSLPrecision,
+                                                                     access.getPrecision(),
                                                                      name.c_str());
         outSamplers->emplace_back(localSamplerUniforms[t], access);
     }