Update automation API when aura window bounds changes.

ui/views/accessibility/ax_window_obj_wrapper.cc

Index: ui/views/accessibility/ax_window_obj_wrapper.cc
diff --git a/ui/views/accessibility/ax_window_obj_wrapper.cc b/ui/views/accessibility/ax_window_obj_wrapper.cc
index c1059476a0ad88a89a17ffe2c6f5810deebb40be..b2d80b9b325660f2dacb1a17f8d089a50cd1890c 100644
--- a/ui/views/accessibility/ax_window_obj_wrapper.cc
+++ b/ui/views/accessibility/ax_window_obj_wrapper.cc
@@ -76,4 +76,14 @@ void AXWindowObjWrapper::OnWindowHierarchyChanged(
     AXAuraObjCache::GetInstance()->Remove(params.target, params.old_parent);
 }
 
+void AXWindowObjWrapper::OnWindowBoundsChanged(aura::Window* window,
+                                               const gfx::Rect& old_bounds,
+                                               const gfx::Rect& new_bounds) {
+  Widget* widget = Widget::GetWidgetForNativeView(window);
+  if (widget) {
+    widget->GetRootView()->NotifyAccessibilityEvent(
+        ui::AX_EVENT_LOCATION_CHANGED, true);
+  }
+}
+
 }  // namespace views