Prepare for date/time input datalist support

public/web/WebDateTimeSuggestion.h

Index: public/web/WebDateTimeSuggestion.h
diff --git a/Source/core/page/PopupOpeningObserver.h b/public/web/WebDateTimeSuggestion.h
similarity index 69%
copy from Source/core/page/PopupOpeningObserver.h
copy to public/web/WebDateTimeSuggestion.h
index 1115bcae833bec6781d6befbac03aedafcf65803..7bd10b6183d0de67be4f5e1d6f96a2e0e7dc29b9 100644
--- a/Source/core/page/PopupOpeningObserver.h
+++ b/public/web/WebDateTimeSuggestion.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 Google Inc. All rights reserved.
+ * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -23,18 +23,30 @@
  * SUCH DAMAGE.
  */
 
-#ifndef PopupOpeningObserver_h
-#define PopupOpeningObserver_h
+#ifndef WebDateTimeSuggestion_h
+#define WebDateTimeSuggestion_h
 
-namespace WebCore {
+#include "public/platform/WebString.h"
 
-class PopupOpeningObserver {
-public:
-    virtual void willOpenPopup() = 0;
+#if BLINK_IMPLEMENTATION
+namespace WebCore { struct DateTimeSuggestion; }
+#endif
+
+namespace blink {
+
+struct WebDateTimeSuggestion {
+    double value;
+    WebString localizedValue;
+    WebString label;
 
-protected:
-    virtual ~PopupOpeningObserver() { }
+    WebDateTimeSuggestion() { }
+
+#if BLINK_IMPLEMENTATION
+    WebDateTimeSuggestion(const WebCore::DateTimeSuggestion&);
+    WebDateTimeSuggestion& operator=(const WebCore::DateTimeSuggestion&);
+#endif
 };
 
-}
+} // namespace blink
+
 #endif