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

ui/views/controls/tree/tree_view.cc

 // 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.
 
 #include "ui/views/controls/tree/tree_view.h"
 
 #include <algorithm>
 
 #include "base/i18n/rtl.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 231 matching lines @@
   }
 
   if (selected_node_)
     ScrollRectToVisible(GetBoundsForNode(selected_node_));
 
   // Notify controller if the old selection was empty to handle the case of
   // remove explicitly resetting selected_node_ before invoking this.
   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() {
   return selected_node_ ? selected_node_->model_node() : NULL;
 }
 
 void TreeView::Collapse(ui::TreeModelNode* model_node) {
   // Don't collapse the root if the root isn't shown, otherwise nothing is
   // displayed.
   if (model_node == root_.model_node() && !root_shown_)
@@ skipping 777 matching lines @@
   if (!is_expanded_)
     return max_width;
   for (int i = 0; i < child_count(); ++i) {
     max_width = std::max(max_width,
                          GetChild(i)->GetMaxWidth(indent, depth + 1));
   }
   return max_width;
 }
 
 }  // namespace views