Move units to new module printing.

printing/units.h

 // Copyright (c) 2006-2008 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 CHROME_BROWSER_PRINTING_UNITS_H__
-#define CHROME_BROWSER_PRINTING_UNITS_H__
+#ifndef PRINTING_UNITS_H_
+#define PRINTING_UNITS_H_
 
 namespace printing {
 
 // Length of a thousanth of inches in 0.01mm unit.
 const int kHundrethsMMPerInch = 2540;
 
 // Converts from one unit system to another using integer arithmetics.
 int ConvertUnit(int value, int old_unit, int new_unit);
 
 // Converts from one unit system to another using doubles.
 double ConvertUnitDouble(double value, double old_unit, double new_unit);
 
 // Converts from 0.001 inch unit to 0.00001 meter.
 int ConvertMilliInchToHundredThousanthMeter(int milli_inch);
 
 // Converts from 0.00001 meter unit to 0.001 inch.
 int ConvertHundredThousanthMeterToMilliInch(int cmm);
 
 }  // namespace printing
 
-#endif  // CHROME_BROWSER_PRINTING_UNITS_H__
-
+#endif  // PRINTING_UNITS_H_