Less strict checked state changes and introduce disabled state for content

content/browser/accessibility/browser_accessibility_auralinux.cc

 // Copyright (c) 2015 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_auralinux.h"
 
 #include <stdint.h>
 #include <string.h>
 
 #include "base/strings/utf_string_conversions.h"
@@ skipping 534 matching lines @@
   if (!obj)
     return NULL;
   AtkStateSet* state_set = ATK_OBJECT_CLASS(browser_accessibility_parent_class)
                                ->ref_state_set(atk_object);
   int32_t state = obj->GetState();
 
   if (state & (1 << ui::AX_STATE_FOCUSABLE))
     atk_state_set_add_state(state_set, ATK_STATE_FOCUSABLE);
   if (obj->manager()->GetFocus() == obj)
     atk_state_set_add_state(state_set, ATK_STATE_FOCUSED);
-  if (state & (1 << ui::AX_STATE_ENABLED))
+  if (!(state & (1 << ui::AX_STATE_DISABLED)))
     atk_state_set_add_state(state_set, ATK_STATE_ENABLED);
 
   return state_set;
 }
 
 static AtkRelationSet* browser_accessibility_ref_relation_set(
     AtkObject* atk_object) {
   AtkRelationSet* relation_set =
       ATK_OBJECT_CLASS(browser_accessibility_parent_class)
           ->ref_relation_set(atk_object);
@@ skipping 368 matching lines @@
     case ui::AX_ROLE_TREE_ITEM:
       atk_role_ = ATK_ROLE_TREE_ITEM;
       break;
     default:
       atk_role_ = ATK_ROLE_UNKNOWN;
       break;
   }
 }
 
 }  // namespace content