Move settings setup for PDF and cloud print into single location in PrintingContext

printing/units.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_UNITS_H_
 #define PRINTING_UNITS_H_
 
 #include "printing/printing_export.h"
 
 namespace printing {
 
-// Length of a thousanth of inches in 0.01mm unit.
+// Length of a thousandth of inches in 0.01mm unit.
 const int kHundrethsMMPerInch = 2540;
 
 // Length of an inch in CSS's 1pt unit.
 // http://dev.w3.org/csswg/css3-values/#absolute-length-units-cm-mm.-in-pt-pc
 const int kPointsPerInch = 72;
 
 // Length of an inch in CSS's 1px unit.
 // http://dev.w3.org/csswg/css3-values/#the-px-unit
 const int kPixelsPerInch = 96;
 
+// Dpi used to save to PDF or Cloud Print.
+const int kDefaultPdfDpi = 300;
+
+// LETTER: 8.5 x 11 inches
+const float kLetterWidthInch = 8.5f;
+const float kLetterHeightInch = 11.0f;
+
+// LEGAL: 8.5 x 14 inches
+const float kLegalWidthInch = 8.5f;
+const float kLegalHeightInch = 14.0f;
+
+// A4: 8.27 x 11.69 inches
+const float kA4WidthInch = 8.27f;
+const float kA4HeightInch = 11.69f;
+
+// A3: 11.69 x 16.54 inches
+const float kA3WidthInch = 11.69f;
+const float kA3HeightInch = 16.54f;
+
 // Converts from one unit system to another using integer arithmetics.
 PRINTING_EXPORT int ConvertUnit(int value, int old_unit, int new_unit);
 
 // Converts from one unit system to another using doubles.
 PRINTING_EXPORT double ConvertUnitDouble(double value, double old_unit,
                                          double new_unit);
 
 // Converts from 0.001 inch unit to 0.00001 meter.
 PRINTING_EXPORT int ConvertMilliInchToHundredThousanthMeter(int milli_inch);
 
 // Converts from 0.00001 meter unit to 0.001 inch.
 PRINTING_EXPORT int ConvertHundredThousanthMeterToMilliInch(int cmm);
 
 // Converts from 1 pixel to 1 point using integers.
 PRINTING_EXPORT int ConvertPixelsToPoint(int pixels);
 
 // Converts from 1 pixel to 1 point using doubles.
 PRINTING_EXPORT double ConvertPixelsToPointDouble(double pixels);
 
 // Converts from 1 point to 1 pixel using doubles.
 double ConvertPointsToPixelDouble(double points);
 
 }  // namespace printing
 
 #endif  // PRINTING_UNITS_H_