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..cbcb779d50c236ff379b689ba3fb5a93aa522f92 100644
--- a/ui/views/controls/tree/tree_view.cc
+++ b/ui/views/controls/tree/tree_view.cc
@@ -249,11 +249,8 @@ void TreeView::SetSelectedNode(TreeModelNode* model_node) {
   if (controller_ && (changed || was_empty_selection))
     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);
-  }
+  if (changed)
+    NotifyAccessibilityEvent(ui::AX_EVENT_SELECTION, true);
 }
 
 TreeModelNode* TreeView::GetSelectedNode() {