Use token-based initialisation for the utility process MojoApplication.

content/browser/utility_process_host_impl.h

 // Copyright (c) 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.
 
 #ifndef CONTENT_BROWSER_UTILITY_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_UTILITY_PROCESS_HOST_IMPL_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 59 matching lines @@
 
  private:
   // Starts a process if necessary.  Returns true if it succeeded or a process
   // has already been started via StartBatchMode().
   bool StartProcess();
 
   // BrowserChildProcessHost:
   bool OnMessageReceived(const IPC::Message& message) override;
   void OnProcessLaunchFailed() override;
   void OnProcessCrashed(int exit_code) override;
-  void OnProcessLaunched() override;
 
   // Cleans up |this| as a result of a failed Start().
   void NotifyAndDelete();
 
   // Notifies the client that the launch failed and deletes |host|.
   static void NotifyLaunchFailedAndDelete(
       base::WeakPtr<UtilityProcessHostImpl> host);
 
   // A pointer to our client interface, who will be informed of progress.
   scoped_refptr<UtilityProcessHostClient> client_;
@@ skipping 32 matching lines @@
 
   // Used to vend weak pointers, and should always be declared last.
   base::WeakPtrFactory<UtilityProcessHostImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UtilityProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_UTILITY_PROCESS_HOST_IMPL_H_