Dart: Renames dart:mojo_blah -> mojo:blah

services/dart/BUILD.gn

Index: services/dart/BUILD.gn
diff --git a/services/dart/BUILD.gn b/services/dart/BUILD.gn
index cd81e599451ecdce7bc7e9509adb71665584948e..0107f2c4f7f84846eb3f0ce60ab2e6f19ee9acc5 100644
--- a/services/dart/BUILD.gn
+++ b/services/dart/BUILD.gn
@@ -63,10 +63,10 @@ action("generate_snapshot_bin") {
     rebase_path(output, root_build_dir),
     "--target_os",
     os,
-    "--url_mapping=dart:mojo_application,$application_path",
-    "--url_mapping=dart:mojo_bindings,$bindings_path",
-    "--url_mapping=dart:mojo_builtin,$builtin_path",
-    "--url_mapping=dart:mojo_core,$core_path",
+    "--url_mapping=mojo:application,$application_path",
+    "--url_mapping=mojo:bindings,$bindings_path",
+    "--url_mapping=mojo:builtin,$builtin_path",
+    "--url_mapping=mojo:core,$core_path",
   ]
 }