Refactor print preview web ui

chrome/browser/resources/print_preview/data/coordinate2d.js

+// Copyright (c) 2012 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.
+
+cr.define('print_preview', function() {
+  'use strict';
+
+  function Coordinate2d(x, y) {
+    this.x_ = x;
+    this.y_ = y;
+  };
+
+  Coordinate2d.prototype = {
+    get x() {
+      return this.x_;
+    },
+
+    get y() {
+      return this.y_;
+    },
+
+    translate: function(x, y) {
+      return new Coordinate2d(this.x_ + x, this.y_ + y);
+    },
+
+    scale: function(factor) {
+      return new Coordinate2d(this.x_ * factor, this.y_ * factor);
+    },
+
+    equals: function(other) {
+      return other != null &&
+          this.x_ == other.x_ &&
+          this.y_ == other.y_;
+    }
+  };
+
+  // Export
+  return {
+    Coordinate2d: Coordinate2d
+  };
+});