Implement accessible states and notifications for the tab strip.

ui/views/controls/textfield/textfield.cc

Index: ui/views/controls/textfield/textfield.cc
diff --git a/ui/views/controls/textfield/textfield.cc b/ui/views/controls/textfield/textfield.cc
index 9407f2d46311a5567321d21b8ffbbbadb03663d1..5cde2ea02c7f7a94ba9ed99cc9f23790189ebdef 100644
--- a/ui/views/controls/textfield/textfield.cc
+++ b/ui/views/controls/textfield/textfield.cc
@@ -1568,9 +1568,9 @@ void Textfield::UpdateAfterChange(bool text_changed, bool cursor_changed) {
     if (cursor_repaint_timer_.IsRunning())
       cursor_repaint_timer_.Reset();
     if (!text_changed) {
-      // TEXT_CHANGED implies SELECTION_CHANGED, so we only need to fire
+      // TEXT_CHANGED implies TEXT_SELECTION_CHANGED, so we only need to fire
       // this if only the selection changed.
-      NotifyAccessibilityEvent(ui::AX_EVENT_SELECTION_CHANGED, true);
+      NotifyAccessibilityEvent(ui::AX_EVENT_TEXT_SELECTION_CHANGED, true);
     }
   }
   if (text_changed || cursor_changed) {