allow unit_tests to re-create service manager context.

content/browser/child_process_launcher.cc

 // Copyright 2012 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/child_process_launcher.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/i18n/icu_util.h"
@@ skipping 141 matching lines @@
 }
 
 // static
 void ChildProcessLauncher::SetRegisteredFilesForService(
     const std::string& service_name,
     catalog::RequiredFileMap required_files) {
   ChildProcessLauncherHelper::SetRegisteredFilesForService(
       service_name, std::move(required_files));
 }
 
+// static
+void ChildProcessLauncher::ResetRegisteredFilesForTesting() {
+  ChildProcessLauncherHelper::ResetRegisteredFilesForTesting();
+}
+
 ChildProcessLauncher::Client* ChildProcessLauncher::ReplaceClientForTest(
     Client* client) {
   Client* ret = client_;
   client_ = client;
   return ret;
 }
 
 }  // namespace content