Don't fire a FOCUS accessibility event on a View that doesn't have focus.

ui/views/controls/tree/tree_view.cc

Index: ui/views/controls/tree/tree_view.cc
diff --git a/ui/views/controls/tree/tree_view.cc b/ui/views/controls/tree/tree_view.cc
index b7918430e50b1a37e9c04d928fc15a8b67b70661..30428a31cadc3a535e06d642f68697863664b61d 100644
--- a/ui/views/controls/tree/tree_view.cc
+++ b/ui/views/controls/tree/tree_view.cc
@@ -250,9 +250,8 @@ void TreeView::SetSelectedNode(TreeModelNode* model_node) {
     controller_->OnTreeViewSelectionChanged(this);
 
   if (changed) {
-    // TODO(dmazzoni): Decide if EVENT_SELECTION_CHANGED is a better choice for
-    // sub-item selection event.
-    NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
+    NotifyAccessibilityEvent(ui::AX_EVENT_TEXT_CHANGED, true);
+    NotifyAccessibilityEvent(ui::AX_EVENT_SELECTION, true);
   }
 }