Add conversion rule for aria-grabbed attributes.

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 360 matching lines @@
         dst->AddIntListAttribute(ui::AX_ATTR_LINE_BREAKS, line_breaks);
       }
 
       if (dst->role == ui::AX_ROLE_TEXT_FIELD &&
           src.textInputType().length()) {
         dst->AddStringAttribute(ui::AX_ATTR_TEXT_INPUT_TYPE,
                                 UTF16ToUTF8(src.textInputType()));
       }
     }
 
+    blink::WebAXOptionalBool optionalBool = src.isAriaGrabbed();
+    if (optionalBool == blink::WebAXOptionalBoolFalse)
+      dst->AddBoolAttribute(ui::AX_ATTR_GRABBED, false);
+    else if (optionalBool == blink::WebAXOptionalBoolTrue)
+      dst->AddBoolAttribute(ui::AX_ATTR_GRABBED, true);
+
     // ARIA role.
     if (element.hasAttribute("role")) {
       dst->AddStringAttribute(ui::AX_ATTR_ROLE,
                               UTF16ToUTF8(element.getAttribute("role")));
     } else {
       std::string role = GetEquivalentAriaRoleString(dst->role);
       if (!role.empty())
         dst->AddStringAttribute(ui::AX_ATTR_ROLE, role);
     }
 
@@ skipping 193 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