Prepare for date/time input datalist support

public/web/WebDateTimeChooserParams.h

Index: public/web/WebDateTimeChooserParams.h
diff --git a/public/web/WebDateTimeChooserParams.h b/public/web/WebDateTimeChooserParams.h
index 2d2b3d9d2e7d097184de1cc86f53a94bfa55784a..443db111a15af82c101910d505fbe4d6b1177484 100644
--- a/public/web/WebDateTimeChooserParams.h
+++ b/public/web/WebDateTimeChooserParams.h
@@ -30,6 +30,7 @@
 #include "../platform/WebString.h"
 #include "../platform/WebVector.h"
 #include "WebDateTimeInputType.h"
+#include "WebDateTimeSuggestion.h"
 
 namespace blink {
 
@@ -46,17 +47,9 @@ struct WebDateTimeChooserParams {
     // The current value of the requester element as a double.
     // NaN means empty value. Should not be infinity.
     double doubleValue;
-    // <datalist> option values associated to the requester element. These
-    // values should not be shown to users. The vector size might be 0.
-    WebVector<WebString> suggestionValues;
-    // Localized values of <datalist> options associated to the requester
-    // element. These values should be shown to users. The vector size must be
-    // same as suggestionValues size.
-    WebVector<WebString> localizedSuggestionValues;
-    // <datalist> option labels associated to the requester element. These
-    // values should be shown to users. The vector size must be same as
-    // suggestionValues size.
-    WebVector<WebString> suggestionLabels;
+    // <datalist> option suggestions associated to the requester element. The
+    // vector size might be 0.
+    WebVector<WebDateTimeSuggestion> suggestions;
     // HTMLInputElement::min attribute value parsed in the valusAsNumber rule,
     // that is to say, milliseconds from the epoch for non-month types and
     // months from the epoch for month type. If the min attribute is missing,