allow unit_tests to re-create service manager context.

content/browser/child_process_launcher_helper.h

 // Copyright 2017 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.
 
 #ifndef CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_H_
 #define CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 142 matching lines @@
   static void ForceNormalProcessTerminationAsync(
       ChildProcessLauncherHelper::Process process);
 
   static void SetProcessBackgroundedOnLauncherThread(
       base::Process process, bool background);
 
   static void SetRegisteredFilesForService(
       const std::string& service_name,
       catalog::RequiredFileMap required_files);
 
+  static void ResetRegisteredFilesForTesting();
+
  private:
   friend class base::RefCountedThreadSafe<ChildProcessLauncherHelper>;
 
   ~ChildProcessLauncherHelper();
 
   void LaunchOnLauncherThread();
 
   const mojo::edk::PlatformHandle& mojo_client_handle() const {
     return mojo_client_handle_.get();
   }
@@ skipping 14 matching lines @@
   mojo::edk::ScopedPlatformHandle mojo_client_handle_;
   mojo::edk::ScopedPlatformHandle mojo_server_handle_;
   bool terminate_on_shutdown_;
 };
 
 }  // namespace internal
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_H_