Support spawnUri in app snapshots.

utils/application_snapshot.gni

Index: utils/application_snapshot.gni
diff --git a/utils/application_snapshot.gni b/utils/application_snapshot.gni
index ffc0653321bb1c0b5eae4f761f4025b96f827ffe..8899703e912870b3f2e223d0accaa29f2ce1b379 100644
--- a/utils/application_snapshot.gni
+++ b/utils/application_snapshot.gni
@@ -49,48 +49,3 @@ template("application_snapshot") {
            ] + training_args
   }
 }
-
-# TODO(28368): Revert to application snapshot after spawnUri issue is fixed. 
-template("script_snapshot") {
-  assert(defined(invoker.main_dart), "Must specify 'main_dart'")
-  assert(defined(invoker.training_args), "Must specify 'training_args'")
-  main_dart = invoker.main_dart
-  training_args = invoker.training_args
-  name = target_name
-  if (defined(invoker.name)) {
-    name = invoker.name
-  }
-  extra_deps = []
-  if (defined(invoker.deps)) {
-    extra_deps += invoker.deps
-  }
-  extra_inputs = []
-  if (defined(invoker.inputs)) {
-    extra_inputs += invoker.inputs
-  }
-  compiled_action(target_name) {
-    tool = get_path_info("$_dart_root/runtime/bin:dart", "abspath")
-    deps = extra_deps + [ "$_dart_root/pkg:pkg_files_stamp" ]
-
-    inputs = extra_inputs + [
-               "$_dart_root/sdk/lib/_internal/sdk_library_metadata/lib/libraries.dart",
-               "$root_gen_dir/pkg_files.stamp",
-             ]
-
-    output = "$root_gen_dir/$name.dart.snapshot"
-    outputs = [
-      output,
-    ]
-
-    dot_packages = rebase_path("$_dart_root/.packages")
-    abs_output = rebase_path(output)
-    main_file = rebase_path(main_dart)
-
-    args = [
-             "--packages=$dot_packages",
-             "--snapshot=$abs_output",
-             "--snapshot-kind=script",
-             main_file,
-           ] + training_args
-  }
-}