Printing: Remove the debug-only |page_number_| from PrintingContext, which has

printing/printing_context.h

 // Copyright (c) 2010 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 "build/build_config.h"
 
 #if defined(OS_WIN)
@@ skipping 162 matching lines @@
   gfx::NativeDrawingContext context_;
 
 #if defined(OS_MACOSX)
   // The native print info object.
   NSPrintInfo* print_info_;
 #endif
 
   // Complete print context settings.
   PrintSettings settings_;
 
-#ifndef NDEBUG
-  // Current page number in the print job.
-  int page_number_;
-#endif
-
 #if defined(OS_WIN)
   // The dialog box for the time it is shown.
   volatile HWND dialog_box_;
 
   // Function pointer that defaults to PrintDlgEx. It can be changed using
   // SetPrintDialog() in tests.
   HRESULT (__stdcall *print_dialog_func_)(LPPRINTDLGEX);
 #endif
 
   // 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_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintingContext);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_H_