Remove unused code

printing/printing_context.h

 // Copyright (c) 2011 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 PRINTING_PRINTING_CONTEXT_H_
 #define PRINTING_PRINTING_CONTEXT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 121 matching lines @@
 
   // Does bookkeeping when an error occurs.
   PrintingContext::Result OnError();
 
   // Complete print context settings.
   PrintSettings settings_;
 
   // Printing context delegate.
   Delegate* delegate_;
 
-  // The dialog box has been dismissed.
-  volatile bool dialog_box_dismissed_;
-
   // Is a print job being done.
   volatile bool in_print_job_;
 
   // Did the user cancel the print job.
   volatile bool abort_printing_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PrintingContext);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_H_