ARIA state/property(aria-relevant,aria-busy) are not exposed correctly on MAC.

content/renderer/accessibility/blink_ax_tree_source.cc

 // Copyright 2014 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/renderer/accessibility/blink_ax_tree_source.h"
 
 #include <set>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ skipping 354 matching lines @@
         (*node_to_browser_plugin_instance_id_map_)[dst->id] =
             browser_plugin->browser_plugin_instance_id();
         dst->AddBoolAttribute(ui::AX_ATTR_IS_AX_TREE_HOST, true);
       }
     }
   }
 
   if (src.isInLiveRegion()) {
     dst->AddBoolAttribute(ui::AX_ATTR_LIVE_ATOMIC, src.liveRegionAtomic());
     dst->AddBoolAttribute(ui::AX_ATTR_LIVE_BUSY, src.liveRegionBusy());
+    if (src.liveRegionBusy())
+      dst->state |= (1 << ui::AX_STATE_BUSY);
     dst->AddStringAttribute(ui::AX_ATTR_LIVE_STATUS,
                             UTF16ToUTF8(src.liveRegionStatus()));
     dst->AddStringAttribute(ui::AX_ATTR_LIVE_RELEVANT,
                             UTF16ToUTF8(src.liveRegionRelevant()));
     dst->AddBoolAttribute(ui::AX_ATTR_CONTAINER_LIVE_ATOMIC,
                           src.containerLiveRegionAtomic());
-    dst->AddBoolAttribute(ui::AX_ATTR_CONTAINER_LIVE_BUSY,

[dmazzoni, 2014/11/19 17:17:27]

Why are you deleting this?

AX_STATE_BUSY is not the same as CONTAINER_LIVE_BUSY.

-                          src.containerLiveRegionBusy());
     dst->AddStringAttribute(ui::AX_ATTR_CONTAINER_LIVE_STATUS,
                             UTF16ToUTF8(src.containerLiveRegionStatus()));
     dst->AddStringAttribute(ui::AX_ATTR_CONTAINER_LIVE_RELEVANT,
                             UTF16ToUTF8(src.containerLiveRegionRelevant()));
   }
 
   if (dst->role == ui::AX_ROLE_PROGRESS_INDICATOR ||
       dst->role == ui::AX_ROLE_SCROLL_BAR ||
       dst->role == ui::AX_ROLE_SLIDER ||
       dst->role == ui::AX_ROLE_SPIN_BUTTON) {
@@ skipping 156 matching lines @@
     AddIntListAttributeFromWebObjects(ui::AX_ATTR_OWNS_IDS, owns, dst);
 }
 
 blink::WebDocument BlinkAXTreeSource::GetMainDocument() const {
   if (render_frame_ && render_frame_->GetWebFrame())
     return render_frame_->GetWebFrame()->document();
   return WebDocument();
 }
 
 }  // namespace content