Add media size select element and ticket item. Do not expose in the UI yet.

chrome/browser/resources/print_preview/data/ticket_items/media_size.js

Index: chrome/browser/resources/print_preview/data/ticket_items/media_size.js
diff --git a/chrome/browser/resources/print_preview/data/ticket_items/media_size.js b/chrome/browser/resources/print_preview/data/ticket_items/media_size.js
new file mode 100644
index 0000000000000000000000000000000000000000..4aab4311c4615749616f8966e8d0b8a2ed8434ba
--- /dev/null
+++ b/chrome/browser/resources/print_preview/data/ticket_items/media_size.js
@@ -0,0 +1,75 @@
+// Copyright 2014 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.ticket_items', function() {
+  'use strict';
+
+  /**
+   * Media size ticket item.
+   * @param {!print_preview.AppState} appState App state used to persist media
+   *     size selection.
+   * @param {!print_preview.DestinationStore} destinationStore Destination store
+   *     used to determine if a destination has the media size capability.
+   * @constructor
+   * @extends {print_preview.ticket_items.TicketItem}
+   */
+  function MediaSize(appState, destinationStore) {
+    print_preview.ticket_items.TicketItem.call(
+        this,
+        appState,
+        print_preview.AppState.Field.MEDIA_SIZE,
+        destinationStore);
+  };
+
+  MediaSize.prototype = {
+    __proto__: print_preview.ticket_items.TicketItem.prototype,
+
+    /** @override */
+    wouldValueBeValid: function(value) {
+      if (!this.isCapabilityAvailable()) {
+        return false;
+      }
+      return this.capability.option.some(function(option) {
+        return option.width_microns == value.width_microns &&
+               option.height_microns == value.height_microns &&
+               option.is_continuous_feed == value.is_continuous_feed &&
+               option.vendor_id == value.vendor_id;
+      });
+    },
+
+    /** @override */
+    isCapabilityAvailable: function() {
+      // TODO(alekseys): Turn it on when the feature is ready (crbug/239879).
+      return false && !!this.capability;
+    },
+
+    /** @return {Object} Media size capability of the selected destination. */
+    get capability() {
+      var destination = this.getSelectedDestInternal();
+      return (destination &&
+              destination.capabilities &&
+              destination.capabilities.printer &&
+              destination.capabilities.printer.media_size) ||
+             null;
+    },
+
+    /** @override */
+    getDefaultValueInternal: function() {
+      var defaultOptions = this.capability.option.filter(function(option) {
+        return option.is_default;
+      });
+      return defaultOptions.length > 0 ? defaultOptions[0] : null;
+    },
+
+    /** @override */
+    getCapabilityNotAvailableValueInternal: function() {
+      return {};
+    }
+  };
+
+  // Export
+  return {
+    MediaSize: MediaSize
+  };
+});