Enable use_once_callback on mojom GN rule by default

services/ui/public/interfaces/ime/BUILD.gn

Index: services/ui/public/interfaces/ime/BUILD.gn
diff --git a/services/ui/public/interfaces/ime/BUILD.gn b/services/ui/public/interfaces/ime/BUILD.gn
index 85909fbfe5e1b813b63ecb5de1c2850cbd087d42..c84682d24a3a7d1c61b1dda36c2f8b927345209c 100644
--- a/services/ui/public/interfaces/ime/BUILD.gn
+++ b/services/ui/public/interfaces/ime/BUILD.gn
@@ -15,6 +15,9 @@ mojom("ime") {
     "//ui/gfx/geometry/mojo",
     "//ui/gfx/range/mojo",
   ]
+
+  # TODO(crbug.com/714018): Convert the implementation to use OnceCallback.
+  use_once_callback = false
 }
 
 mojom("test_interfaces") {
@@ -25,4 +28,7 @@ mojom("test_interfaces") {
   public_deps = [
     ":ime",
   ]
+
+  # TODO(crbug.com/714018): Convert the implementation to use OnceCallback.
+  use_once_callback = false
 }