Reland: Add an event to notify accessibility when a permissions bubble gets shown.

ui/views/bubble/bubble_delegate.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/bubble/bubble_delegate.h"
 
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/geometry/rect.h"
@@ skipping 287 matching lines @@
 }
 
 void BubbleDelegateView::HandleVisibilityChanged(Widget* widget, bool visible) {
   if (widget == GetWidget() && anchor_widget() &&
       anchor_widget()->GetTopLevelWidget()) {
     if (visible)
       anchor_widget()->GetTopLevelWidget()->DisableInactiveRendering();
     else
       anchor_widget()->GetTopLevelWidget()->EnableInactiveRendering();
   }
+
+  // Fire AX_EVENT_ALERT for bubbles marked as AX_ROLE_ALERT_DIALOG; this
+  // instructs accessibility tools to read the bubble in its entirety rather
+  // than just its title and initially focused view.  See
+  // http://crbug.com/474622 for details.
+  if (widget == GetWidget() && visible) {
+    ui::AXViewState state;
+    GetAccessibleState(&state);
+    if (state.role == ui::AX_ROLE_ALERT_DIALOG)
+      NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
+  }
 }
 
 }  // namespace views