Take GL version and extensions correctly into account when binding functions

ui/gl/gl_context_nsview.mm

Index: ui/gl/gl_context_nsview.mm
diff --git a/ui/gl/gl_context_nsview.mm b/ui/gl/gl_context_nsview.mm
index dd7a5a64851e4dbea0c833f1e10bc8a45a8b445e..8f38d08166d0a1fa8b08b08e9367456362f588cf 100644
--- a/ui/gl/gl_context_nsview.mm
+++ b/ui/gl/gl_context_nsview.mm
@@ -66,6 +66,10 @@ bool GLContextNSView::MakeCurrent(GLSurface* surface) {
 
   SetRealGLApi();
   SetCurrent(surface);
+  if (!InitializeDynamicBindings()) {
+    ReleaseCurrent(surface);
+    return false;
+  }
 
   if (!surface->OnMakeCurrent(this)) {
     LOG(ERROR) << "Unable to make gl context current.";