[Sync] Move //components/sync_driver to //components/sync/driver.

components/sync_driver/resources/about.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('chrome.sync.about_tab', function() {
-  // Contains the latest snapshot of sync about info.
-  chrome.sync.aboutInfo = {};
-
-  function highlightIfChanged(node, oldVal, newVal) {
-    function clearHighlight() {
-      this.removeAttribute('highlighted');
-    }
-
-    var oldStr = oldVal.toString();
-    var newStr = newVal.toString();
-    if (oldStr != '' && oldStr != newStr) {
-      // Note the addListener function does not end up creating duplicate
-      // listeners.  There can be only one listener per event at a time.
-      // Reference: https://developer.mozilla.org/en/DOM/element.addEventListener
-      node.addEventListener('webkitAnimationEnd', clearHighlight, false);
-      node.setAttribute('highlighted', '');
-    }
-  }
-
-  function refreshAboutInfo(aboutInfo) {
-    chrome.sync.aboutInfo = aboutInfo;
-    var aboutInfoDiv = $('about-info');
-    jstProcess(new JsEvalContext(aboutInfo), aboutInfoDiv);
-  }
-
-  function onAboutInfoUpdatedEvent(e) {
-    refreshAboutInfo(e.details);
-  }
-
-  /**
-   * Helper to determine if an element is scrolled to its bottom limit.
-   * @param {Element} elem element to check
-   * @return {boolean} true if the element is scrolled to the bottom
-   */
-  function isScrolledToBottom(elem) {
-    return elem.scrollHeight - elem.scrollTop == elem.clientHeight;
-  }
-
-  /**
-   * Helper to scroll an element to its bottom limit.
-   * @param {Element} elem element to be scrolled
-   */
-  function scrollToBottom(elem) {
-    elem.scrollTop = elem.scrollHeight - elem.clientHeight;
-  }
-
-  /** Container for accumulated sync protocol events. */
-  var protocolEvents = [];
-
-  /** We may receive re-delivered events.  Keep a record of ones we've seen. */
-  var knownEventTimestamps = {};
-
-  /**
-   * Callback for incoming protocol events.
-   * @param {Event} e The protocol event.
-   */
-  function onReceivedProtocolEvent(e) {
-    var details = e.details;
-
-    // Return early if we've seen this event before.  Assumes that timestamps
-    // are sufficiently high resolution to uniquely identify an event.
-    if (knownEventTimestamps.hasOwnProperty(details.time)) {
-      return;
-    }
-
-    knownEventTimestamps[details.time] = true;
-    protocolEvents.push(details);
-
-    var trafficContainer = $('traffic-event-container');
-
-    // Scroll to the bottom if we were already at the bottom.  Otherwise, leave
-    // the scrollbar alone.
-    var shouldScrollDown = isScrolledToBottom(trafficContainer);
-
-    var context = new JsEvalContext({ events: protocolEvents });
-    jstProcess(context, trafficContainer);
-
-    if (shouldScrollDown)
-      scrollToBottom(trafficContainer);
-  }
-
-  /**
-   * Initializes state and callbacks for the protocol event log UI.
-   */
-  function initProtocolEventLog() {
-    chrome.sync.events.addEventListener(
-        'onProtocolEvent', onReceivedProtocolEvent);
-
-    // Make the prototype jscontent element disappear.
-    jstProcess({}, $('traffic-event-container'));
-  }
-
-  /**
-   * Initializes listeners for status dump and import UI.
-   */
-  function initStatusDumpButton() {
-    $('status-data').hidden = true;
-
-    var dumpStatusButton = $('dump-status');
-    dumpStatusButton.addEventListener('click', function(event) {
-      var aboutInfo = chrome.sync.aboutInfo;
-      if (!$('include-ids').checked) {
-        aboutInfo.details = chrome.sync.aboutInfo.details.filter(function(el) {
-          return !el.is_sensitive;
-        });
-      }
-      var data = '';
-      data += new Date().toString() + '\n';
-      data += '======\n';
-      data += 'Status\n';
-      data += '======\n';
-      data += JSON.stringify(aboutInfo, null, 2) + '\n';
-
-      $('status-text').value = data;
-      $('status-data').hidden = false;
-    });
-
-    var importStatusButton = $('import-status');
-    importStatusButton.addEventListener('click', function(event) {
-      $('status-data').hidden = false;
-      if ($('status-text').value.length == 0) {
-        $('status-text').value =
-            'Paste sync status dump here then click import.';
-        return;
-      }
-
-      // First remove any characters before the '{'.
-      var data = $('status-text').value;
-      var firstBrace = data.indexOf('{');
-      if (firstBrace < 0) {
-        $('status-text').value = 'Invalid sync status dump.';
-        return;
-      }
-      data = data.substr(firstBrace);
-
-      // Remove listeners to prevent sync events from overwriting imported data.
-      chrome.sync.events.removeEventListener(
-          'onAboutInfoUpdated',
-          onAboutInfoUpdatedEvent);
-
-      var aboutInfo = JSON.parse(data);
-      refreshAboutInfo(aboutInfo);
-    });
-  }
-
-  /**
-   * Toggles the given traffic event entry div's "expanded" state.
-   * @param {MouseEvent} e the click event that triggered the toggle.
-   */
-  function expandListener(e) {
-    e.target.classList.toggle('traffic-event-entry-expanded');
-  }
-
-  /**
-   * Attaches a listener to the given traffic event entry div.
-   * @param {HTMLElement} element the element to attach the listener to.
-   */
-  function addExpandListener(element) {
-    element.addEventListener('click', expandListener, false);
-  }
-
-  function onLoad() {
-    initStatusDumpButton();
-    initProtocolEventLog();
-
-    chrome.sync.events.addEventListener(
-        'onAboutInfoUpdated',
-        onAboutInfoUpdatedEvent);
-
-    // Register to receive a stream of event notifications.
-    chrome.sync.registerForEvents();
-
-    // Request an about info update event to initialize the page.
-    chrome.sync.requestUpdatedAboutInfo();
-  }
-
-  return {
-    onLoad: onLoad,
-    addExpandListener: addExpandListener,
-    highlightIfChanged: highlightIfChanged
-  };
-});
-
-document.addEventListener(
-    'DOMContentLoaded', chrome.sync.about_tab.onLoad, false);