Launches a privileged utility process.

content/public/browser/utility_process_host_client.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_PUBLIC_BROWSER_UTILITY_PROCESS_HOST_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_UTILITY_PROCESS_HOST_CLIENT_H_
 
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 
 namespace IPC {
 class Message;
 }
 
 namespace content {
 
 // An interface to be implemented by consumers of the utility process to
 // get results back.  All functions are called on the thread passed along
 // to UtilityProcessHost.
 class UtilityProcessHostClient
     : public base::RefCountedThreadSafe<UtilityProcessHostClient> {
  public:
   // Called when the process has crashed.
   virtual void OnProcessCrashed(int exit_code) {}
 
+  // Called when the process fails to launch, i.e. it has no exit code.
+  virtual void OnProcessLaunchFailed() {}
+
   // Allow the client to filter IPC messages.
   virtual bool OnMessageReceived(const IPC::Message& message) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<UtilityProcessHostClient>;
 
   virtual ~UtilityProcessHostClient() {}
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_UTILITY_PROCESS_HOST_CLIENT_H_