Mojo bindings environment: remove usage in gles2.

mojo/public/platform/native/gles2_thunks.cc

Index: mojo/public/platform/native/gles2_thunks.cc
diff --git a/mojo/public/platform/native/gles2_thunks.cc b/mojo/public/platform/native/gles2_thunks.cc
index 2350fcea64c6095ae3b9da5b99f0da1720a7fccb..6d84279bfea036f196c815ae984a055b2cbd601a 100644
--- a/mojo/public/platform/native/gles2_thunks.cc
+++ b/mojo/public/platform/native/gles2_thunks.cc
@@ -17,11 +17,10 @@ static MojoGLES2ControlThunks g_control_thunks = {0};
 MojoGLES2Context MojoGLES2CreateContext(MojoHandle handle,
                                         const int32_t* attrib_list,
                                         MojoGLES2ContextLost lost_callback,
-                                        void* closure,
-                                        const MojoAsyncWaiter* async_waiter) {
+                                        void* closure) {
   assert(g_control_thunks.GLES2CreateContext);
-  return g_control_thunks.GLES2CreateContext(
-      handle, attrib_list, lost_callback, closure, async_waiter);
+  return g_control_thunks.GLES2CreateContext(handle, attrib_list, lost_callback,
+                                             closure);
 }
 
 void MojoGLES2DestroyContext(MojoGLES2Context context) {