Remove mojo::String.

content/browser/service_worker/service_worker_version_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/service_worker/service_worker_version.h"
 
 #include <stdint.h>
 #include <tuple>
 
 #include "base/macros.h"
@@ skipping 163 matching lines @@
 
   void DoTerminateProcess(const DoTerminateProcessCallback& callback) override {
     NOTREACHED();
   }
 
   void CreateFolder(const CreateFolderCallback& callback) override {
     NOTREACHED();
   }
 
   void GetRequestorName(const GetRequestorNameCallback& callback) override {
-    callback.Run(mojo::String(""));
+    callback.Run("");
   }
 
   void CreateSharedBuffer(const std::string& message,
                           const CreateSharedBufferCallback& callback) override {
     NOTREACHED();
   }
 
  private:
   explicit TestServiceImpl() {}
 };
@@ skipping 1589 matching lines @@
 INSTANTIATE_TEST_CASE_P(ServiceWorkerFailToStartTest,
                         ServiceWorkerFailToStartTest,
                         testing::Bool());
 INSTANTIATE_TEST_CASE_P(ServiceWorkerNavigationHintUMATest,
                         ServiceWorkerNavigationHintUMATest,
                         testing::Bool());
 INSTANTIATE_TEST_CASE_P(ServiceWorkerStallInStoppingTest,
                         ServiceWorkerStallInStoppingTest,
                         testing::Bool());
 }  // namespace content