ui: Cleanup class/struct forward declarations

chrome/renderer/resources/extensions/automation_custom_bindings.js

Index: chrome/renderer/resources/extensions/automation_custom_bindings.js
diff --git a/chrome/renderer/resources/extensions/automation_custom_bindings.js b/chrome/renderer/resources/extensions/automation_custom_bindings.js
index 350f2179df2d8a1e1e814ffdaa5f60cb9d8b18ec..10fd29d0609708f8dee99df03c2d0a9fd36de032 100644
--- a/chrome/renderer/resources/extensions/automation_custom_bindings.js
+++ b/chrome/renderer/resources/extensions/automation_custom_bindings.js
@@ -278,10 +278,22 @@ automationInternal.onAccessibilityEvent.addListener(function(eventParams) {
   var id = eventParams.treeID;
   var targetTree = AutomationRootNode.getOrCreate(id);
 
+  // Work around an issue where Chrome sends us 'blur' events on the
+  // root node when nothing has focus, we need to treat those as focus
+  // events but otherwise not handle blur events specially.
+  var isFocusEvent = false;
+  if (eventParams.eventType == schema.EventType.focus) {
+    isFocusEvent = true;
+  } else if (eventParams.eventType == schema.EventType.blur) {
+    var node = privates(targetTree).impl.get(eventParams.targetID);
+    if (node == node.root)
+      isFocusEvent = true;
+  }
+
   // When we get a focus event, ignore the actual event target, and instead
   // check what node has focus globally. If that represents a focus change,
   // fire a focus event on the correct target.
-  if (eventParams.eventType == schema.EventType.focus) {
+  if (isFocusEvent) {
     var previousFocusedNode = automationUtil.focusedNode;
     automationUtil.updateFocusedNode();
     if (automationUtil.focusedNode &&