Introduce HTMLDataListOptionsCollection subclass for HTMLCollection

Source/core/html/forms/ColorInputType.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 20 matching lines @@
 #include "config.h"
 #include "core/html/forms/ColorInputType.h"
 
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "bindings/core/v8/ScriptController.h"
 #include "core/CSSPropertyNames.h"
 #include "core/InputTypeNames.h"
 #include "core/events/MouseEvent.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLDataListElement.h"
+#include "core/html/HTMLDataListOptionsCollection.h"
 #include "core/html/HTMLDivElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLOptionElement.h"
 #include "core/page/Chrome.h"
 #include "core/rendering/RenderView.h"
 #include "platform/ColorChooser.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/graphics/Color.h"
 #include "wtf/PassOwnPtr.h"
@@ skipping 178 matching lines @@
 bool ColorInputType::shouldShowSuggestions() const
 {
     return element().fastHasAttribute(listAttr);
 }
 
 Vector<ColorSuggestion> ColorInputType::suggestions() const
 {
     Vector<ColorSuggestion> suggestions;
     HTMLDataListElement* dataList = element().dataList();
     if (dataList) {
-        RefPtrWillBeRawPtr<HTMLCollection> options = dataList->options();
-        for (unsigned i = 0; HTMLOptionElement* option = toHTMLOptionElement(options->item(i)); i++) {
+        RefPtrWillBeRawPtr<HTMLDataListOptionsCollection> options = dataList->options();
+        for (unsigned i = 0; HTMLOptionElement* option = options->item(i); i++) {
             if (!element().isValidValue(option->value()))
                 continue;
             Color color;
             if (!color.setFromString(option->value()))
                 continue;
             ColorSuggestion suggestion(color, option->label().left(maxSuggestionLabelLength));
             suggestions.append(suggestion);
             if (suggestions.size() >= maxSuggestions)
                 break;
         }
     }
     return suggestions;
 }
 
 } // namespace blink