Re-land: Update json_schema_compiler to handle the Automation extension API

chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions.js

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions.js
index 95c43aa651399b52970d058cb5251de307792d90..57197e2d1fd328d7677aa30d1e2d1e29a70c7a2b 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions.js
@@ -14,6 +14,7 @@ goog.scope(function() {
 var AutomationNode = chrome.automation.AutomationNode;
 var RoleType = chrome.automation.RoleType;
 var TreeChange = chrome.automation.TreeChange;
+var TreeChangeObserverFilter = chrome.automation.TreeChangeObserverFilter;
 
 /**
  * ChromeVox2 live region handler.
@@ -43,7 +44,8 @@ LiveRegions = function(chromeVoxState) {
    */
   this.liveRegionNodeSet_ = new WeakSet();
   chrome.automation.addTreeChangeObserver(
-      'liveRegionTreeChanges', this.onTreeChange.bind(this));
+      TreeChangeObserverFilter.LIVE_REGION_TREE_CHANGES,
+      this.onTreeChange.bind(this));
 };
 
 /**
@@ -91,7 +93,7 @@ LiveRegions.prototype = {
     var webView = AutomationUtil.getTopLevelRoot(node);
     webView = webView ? webView.parent : null;
     if (!LiveRegions.announceLiveRegionsFromBackgroundTabs_ &&
-        currentRange.start.node.role != RoleType.desktop &&
+        currentRange.start.node.role != RoleType.DESKTOP &&
         (!webView || !webView.state.focused)) {
       return;
     }