Handling of different types of empty alt

content/shell/test_runner/web_ax_object_proxy.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/shell/test_runner/web_ax_object_proxy.h"
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
@@ skipping 1610 matching lines @@
 std::string WebAXObjectProxy::NameFrom() {
   accessibility_object_.UpdateLayoutAndCheckValidity();
   blink::WebAXNameFrom nameFrom = blink::kWebAXNameFromUninitialized;
   blink::WebVector<blink::WebAXObject> nameObjects;
   accessibility_object_.GetName(nameFrom, nameObjects);
   switch (nameFrom) {
     case blink::kWebAXNameFromUninitialized:
       return "";
     case blink::kWebAXNameFromAttribute:
       return "attribute";
+    case blink::kWebAXNameFromAttributeExplicitlyEmpty:
+      return "attributeExplicitlyEmpty";
     case blink::kWebAXNameFromCaption:
       return "caption";
     case blink::kWebAXNameFromContents:
       return "contents";
     case blink::kWebAXNameFromPlaceholder:
       return "placeholder";
     case blink::kWebAXNameFromRelatedElement:
       return "relatedElement";
     case blink::kWebAXNameFromValue:
       return "value";
@@ skipping 213 matching lines @@
   v8::Local<v8::Value> value_handle =
       gin::CreateHandle(isolate, new WebAXObjectProxy(object, this)).ToV8();
   if (value_handle.IsEmpty())
     return v8::Local<v8::Object>();
   v8::Local<v8::Object> handle = value_handle->ToObject(isolate);
   elements_.Append(handle);
   return handle;
 }
 
 }  // namespace test_runner