Prepare for date/time input datalist support

Source/platform/DateTimeChooser.h

 /*
  * Copyright (C) 2012 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 @@
 #ifndef DateTimeChooser_h
 #define DateTimeChooser_h
 
 #include "platform/PlatformExport.h"
 #include "platform/geometry/IntRect.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
+struct DateTimeSuggestion {
+    double value;
+    String localizedValue;
+    String label;
+};
+
 struct DateTimeChooserParameters {
     AtomicString type;
     IntRect anchorRectInRootView;
     // Locale name for which the chooser should be localized. This
     // might be an invalid name because it comes from HTML lang
     // attributes.
     AtomicString locale;
-    String currentValue;
-    Vector<String> suggestionValues;
-    Vector<String> localizedSuggestionValues;
-    Vector<String> suggestionLabels;
+    double currentValue;
+    Vector<DateTimeSuggestion> suggestions;
     double minimum;
     double maximum;
     double step;
     double stepBase;
     bool required;
     bool isAnchorElementRTL;
 };
 
 // For pickers like color pickers and date pickers.
 class PLATFORM_EXPORT DateTimeChooser : public RefCounted<DateTimeChooser> {
 public:
     virtual ~DateTimeChooser();
 
     virtual void endChooser() = 0;
 };
 
 } // namespace WebCore
 #endif // DateTimeChooser_h