Revert of Use the serviceworker with mojo by default

content/browser/service_worker/service_worker_test_utils.h

Index: content/browser/service_worker/service_worker_test_utils.h
diff --git a/content/browser/service_worker/service_worker_test_utils.h b/content/browser/service_worker/service_worker_test_utils.h
index 8aa67edbb47a3365e5efcf546fde5a047d74ed28..2a15815c30b017a43805ae000b196660d52b26ab 100644
--- a/content/browser/service_worker/service_worker_test_utils.h
+++ b/content/browser/service_worker/service_worker_test_utils.h
@@ -19,14 +19,18 @@
                                public testing::WithParamInterface<bool> {
  protected:
   void SetUp() override {
-    if (!is_mojo_enabled()) {
+    is_mojo_enabled_ = GetParam();
+    if (is_mojo_enabled()) {
       base::CommandLine::ForCurrentProcess()->AppendSwitch(
-          switches::kDisableMojoServiceWorker);
+          switches::kMojoServiceWorker);
     }
     TestClass::SetUp();
   }
 
-  bool is_mojo_enabled() const { return GetParam(); }
+  bool is_mojo_enabled() const { return is_mojo_enabled_; }
+
+ private:
+  bool is_mojo_enabled_ = false;
 };
 
 template <typename Arg>