Support accessible inline text boxes.

content/browser/accessibility/browser_accessibility_gtk.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 "content/browser/accessibility/browser_accessibility_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/accessibility/browser_accessibility_manager_gtk.h"
@@ skipping 190 matching lines @@
 
   BrowserAccessibilityManagerGtk* manager =
       static_cast<BrowserAccessibilityManagerGtk*>(obj->manager());
   return gtk_widget_get_accessible(manager->parent_widget());
 }
 
 static gint browser_accessibility_get_n_children(AtkObject* atk_object) {
   BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
   if (!obj)
     return 0;
+
+  if (obj->IsLeaf())
+    return 0;
+
   return obj->children().size();
 }
 
 static AtkObject* browser_accessibility_ref_child(
     AtkObject* atk_object, gint index) {
   BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
   if (!obj)
     return NULL;
+
+  if (obj->IsLeaf())
+    return NULL;
+
+  if (index < 0 || index >= static_cast<gint>(obj->children().size()))
+    return NULL;
+
   AtkObject* result =
       obj->children()[index]->ToBrowserAccessibilityGtk()->GetAtkObject();
   g_object_ref(result);
   return result;
 }
 
 static gint browser_accessibility_get_index_in_parent(AtkObject* atk_object) {
   BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
   if (!obj)
     return 0;
@@ skipping 275 matching lines @@
     case WebKit::WebAXRoleTextField:
       atk_role_ = ATK_ROLE_ENTRY;
       break;
     default:
       atk_role_ = ATK_ROLE_UNKNOWN;
       break;
   }
 }
 
 }  // namespace content