MD History: Display synced tabs history

chrome/browser/resources/md_history/synced_device_manager.js

+// Copyright 2016 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.
+
+Polymer({
+  is: 'synced-device-manager',
+
+  properties: {
+    // An array of synced devices with synced tab data.
+    syncedDevices: {
+      type: Array,
+      value: []
+    }
+  },
+
+  /**
+   * Re-organises the sessionList information.
+   */
+  addSyncedHistory: function(sessionList) {
+    // Does not add more items onto the page when the sessionList updates.
+    // TODO(yingran) : update the cards dynamically by refreshing the tab list
+    // and last update time for each synced tab card.
+    if (this.syncedDevices.length > 0) {
+      return;
+    }
+
+    for (var i = 0; i < sessionList.length && sessionList[i].windows[0]; i++) {
+      this.push('syncedDevices', {
+        device: sessionList[i].name,
+        lastUpdateTime: '- ' + sessionList[i].modifiedTime,
+        tabs: sessionList[i].windows[0].tabs,
+      });
+    }
+  }
+});