Add support for EGLImage to GrGLInterface

src/gpu/gl/SkNullGLContext.cpp

Index: src/gpu/gl/SkNullGLContext.cpp
diff --git a/src/gpu/gl/SkNullGLContext.cpp b/src/gpu/gl/SkNullGLContext.cpp
index 877eed9d770031a97e937f3416c0e80b940c3c42..e2a80ce2b37e72ca6f2c68c85f9a00090c6477b0 100644
--- a/src/gpu/gl/SkNullGLContext.cpp
+++ b/src/gpu/gl/SkNullGLContext.cpp
@@ -491,7 +491,7 @@ static GrGLInterface* create_null_interface(State* state) {
     functions->fBindFragDataLocationIndexed = noOpGLBindFragDataLocationIndexed;
 
     interface->fExtensions.init(kGL_GrGLStandard, functions->fGetString, functions->fGetStringi,
-                                functions->fGetIntegerv);
+                                functions->fGetIntegerv, nullptr, GR_EGL_NO_DISPLAY);
     return interface;
 }