Enable swarming for some test binaries on Mac GN builds.

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index 994a17a9eed776bab563bdba6646364cf614813d..f022308bf0ad3d99214d7a7b36b6a99d94f20632 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -2024,7 +2024,8 @@ test("base_unittests") {
     if (is_win) {
       data += [ "$root_out_dir/base_unittests.exe.pdb" ]
     } else if (is_mac) {
-      data += [ "$root_out_dir/base_unittests.dSYM/" ]
+      # TODO(crbug.com/330301): make this conditional on mac_strip_release.
+      # data += [ "$root_out_dir/base_unittests.dSYM/" ]
     }
   }
 }