Handling of different types of empty alt

third_party/WebKit/Source/modules/accessibility/InspectorTypeBuilderHelper.cpp

 // Copyright 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 "modules/accessibility/InspectorTypeBuilderHelper.h"
 
 #include "core/dom/DOMNodeIds.h"
 #include "modules/accessibility/AXObject.h"
 #include "modules/accessibility/AXObjectCacheImpl.h"
 
@@ skipping 152 matching lines @@
   }
   return AXValue::create()
       .setType(value_type)
       .setRelatedNodes(std::move(related_nodes))
       .build();
 }
 
 String ValueSourceType(AXNameFrom name_from) {
   switch (name_from) {
     case kAXNameFromAttribute:
+    case kAXNameFromAttributeExplicitlyEmpty:
     case kAXNameFromTitle:
     case kAXNameFromValue:
       return AXValueSourceTypeEnum::Attribute;
     case kAXNameFromContents:
       return AXValueSourceTypeEnum::Contents;
     case kAXNameFromPlaceholder:
       return AXValueSourceTypeEnum::Placeholder;
     case kAXNameFromCaption:
     case kAXNameFromRelatedElement:
       return AXValueSourceTypeEnum::RelatedElement;
@@ skipping 52 matching lines @@
   if (name_source.superseded)
     value_source->setSuperseded(true);
   if (name_source.invalid)
     value_source->setInvalid(true);
   if (name_source.native_source != kAXTextFromNativeHTMLUninitialized)
     value_source->setNativeSource(NativeSourceType(name_source.native_source));
   return value_source;
 }
 
 }  // namespace blink