Include glGetMultisamplefv API

src/gpu/gl/GrGLNoOpInterface.cpp

Index: src/gpu/gl/GrGLNoOpInterface.cpp
diff --git a/src/gpu/gl/GrGLNoOpInterface.cpp b/src/gpu/gl/GrGLNoOpInterface.cpp
index f08d737d588183bdb661f6aa7f5f5bf3d60c6c9f..3cf9ecd1e2fa3a6dfa31e05e3f1b16ac15dd35aa 100644
--- a/src/gpu/gl/GrGLNoOpInterface.cpp
+++ b/src/gpu/gl/GrGLNoOpInterface.cpp
@@ -561,6 +561,12 @@ GrGLvoid GR_GL_FUNCTION_TYPE noOpGLGetInfoLog(GrGLuint program,
    }
 }
 
+GrGLvoid GR_GL_FUNCTION_TYPE noOpGLGetMultisamplefv(GrGLenum pname,
+                                                    GrGLuint index,
+                                                    GrGLfloat* val) {
+    val[0] = val[1] = 0.5f;
+}
+
 GrGLvoid GR_GL_FUNCTION_TYPE noOpGLGetShaderOrProgramiv(GrGLuint program,
                                                         GrGLenum pname,
                                                         GrGLint* params) {