Print Preview: Adding UI for margin settings.

chrome/browser/resources/print_preview/print_preview_utils.js

 // 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.
 
 /**
  * Returns true if |toTest| contains only digits. Leading and trailing
  * whitespace is allowed.
  * @param {string} toTest The string to be tested.
  */
 function isInteger(toTest) {
@@ skipping 185 matching lines @@
  * |endPointB| are included.
  * @param {number} endPointA One end of the desired range.
  * @param {number} endPointB  The other end of the desired range.
  * @return {number} The random integer.
  */
 function randomInteger(endPointA, endPointB) {
   from = Math.min(endPointA, endPointB);
   to = Math.max(endPointA, endPointB);
   return Math.floor(Math.random() * (to - from + 1) + from);
 }
+
+// Number of points per inch.
+POINTS_PER_INCH = 72;
+
+/**
+ * Converts |value| from inches to points.
+ * @param {number} value The number in inches.
+ * @return {number} |value| in points.
+ */
+function convertInchesToPoints(value) {
+  return value * POINTS_PER_INCH;
+}
+
+/**
+ * Converts |value| from points to inches.
+ * @param {number} value The number in points.
+ * @return {number} |value| in inches.
+ */
+function convertPointsToInches(value) {
+  return value / POINTS_PER_INCH;
+}