Enable swarming for some test binaries on Mac GN builds.

ui/base/BUILD.gn

Index: ui/base/BUILD.gn
diff --git a/ui/base/BUILD.gn b/ui/base/BUILD.gn
index fa9817394bcf29ec67cd7517d4703af78ddff285..d229003c647d721a541707f03efbdc6c0878237c 100644
--- a/ui/base/BUILD.gn
+++ b/ui/base/BUILD.gn
@@ -945,7 +945,8 @@ test("ui_base_unittests") {
     data += [ "$root_out_dir/ui_unittests Framework.framework/" ]
 
     if (is_asan && symbol_level == 0) {
-      data += [ "$root_out_dir/ui_base_unittests.dSYM/" ]
+      # TODO(crbug.com/330301): make this conditional on mac_strip_release.
+      # data += [ "$root_out_dir/ui_base_unittests.dSYM/" ]
     }
   }
 }