Send a11y events from NativeTextfieldViews when the state changes.

ui/views/controls/textfield/native_textfield_views.cc

Index: ui/views/controls/textfield/native_textfield_views.cc
===================================================================
--- ui/views/controls/textfield/native_textfield_views.cc	(revision 112880)
+++ ui/views/controls/textfield/native_textfield_views.cc	(working copy)
@@ -458,6 +458,8 @@
   model_->SelectRange(range);
   OnCaretBoundsChanged();
   SchedulePaint();
+  textfield_->GetWidget()->NotifyAccessibilityEvent(

[sky, 2011/12/07 17:10:01]

I'm not familiar with EVENT_TEXT_CHANGED. Should it be sent when only the
selection changes?

[dmazzoni, 2011/12/07 17:25:35]

TEXT_CHANGED implies SELECTION_CHANGED, but you're right, it'd be better to use
SELECTION_CHANGED if that's all that changed.

I modified the logic to send the appropriate event. Sometimes now both will get
fired (like during an autocomplete), but there's no harm in that, the assistive
technology will ignore the second notification.

+      textfield_, ui::AccessibilityTypes::EVENT_TEXT_CHANGED, true);
 }
 
 void NativeTextfieldViews::GetSelectionModel(gfx::SelectionModel* sel) const {
@@ -946,6 +948,8 @@
   if (text_changed || cursor_changed) {
     OnCaretBoundsChanged();
     SchedulePaint();
+    textfield_->GetWidget()->NotifyAccessibilityEvent(
+        textfield_, ui::AccessibilityTypes::EVENT_TEXT_CHANGED, true);
   }
 }