Wire up process launch error codes.

content/public/browser/utility_process_host_client.h

Index: content/public/browser/utility_process_host_client.h
diff --git a/content/public/browser/utility_process_host_client.h b/content/public/browser/utility_process_host_client.h
index bd7e89d62032e9bda6c2aeb97fe80ebff77d6261..cf546476ac09b4b091b8625b14d33db63ddb518f 100644
--- a/content/public/browser/utility_process_host_client.h
+++ b/content/public/browser/utility_process_host_client.h
@@ -23,8 +23,9 @@ class UtilityProcessHostClient
   // 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() {}
+  // Called when the process fails to launch. |error_code| is one of
+  // LaunchResultCode or sandbox::ResultCode containing the error.
+  virtual void OnProcessLaunchFailed(int error_code) {}
 
   // Allow the client to filter IPC messages.
   virtual bool OnMessageReceived(const IPC::Message& message) = 0;