Include glGetMultisamplefv API

src/gpu/gl/GrGLInterface.cpp

Index: src/gpu/gl/GrGLInterface.cpp
diff --git a/src/gpu/gl/GrGLInterface.cpp b/src/gpu/gl/GrGLInterface.cpp
index c09efae2b88bd87007efdcfdda0209fd368d44f2..84c51fb2524cc08a7ca85bee3a7f131265f95b77 100644
--- a/src/gpu/gl/GrGLInterface.cpp
+++ b/src/gpu/gl/GrGLInterface.cpp
@@ -487,6 +487,14 @@ bool GrGLInterface::validate() const {
     }
 
     if ((kGL_GrGLStandard == fStandard &&
+         (glVer >= GR_GL_VER(3,2) || fExtensions.has("GL_ARB_texture_multisample"))) ||
+        (kGLES_GrGLStandard == fStandard && glVer >= GR_GL_VER(3,1))) {
+        if (NULL == fFunctions.fGetMultisamplefv) {
+            RETURN_FALSE_INTERFACE
+        }
+    }
+
+    if ((kGL_GrGLStandard == fStandard &&
          (glVer >= GR_GL_VER(4,3) || fExtensions.has("GL_ARB_program_interface_query"))) ||
         (kGLES_GrGLStandard == fStandard && glVer >= GR_GL_VER(3,1))) {
         if (nullptr == fFunctions.fGetProgramResourceLocation) {