Prepare for date/time input datalist support

Source/core/html/shadow/PickerIndicatorElement.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 32 matching lines @@
 
 class PickerIndicatorElement FINAL : public HTMLDivElement, public DateTimeChooserClient {
 public:
     // PickerIndicatorOwner implementer must call removePickerIndicatorOwner when
     // it doesn't handle event, e.g. at destruction.
     class PickerIndicatorOwner {
     public:
         virtual ~PickerIndicatorOwner() { }
         virtual bool isPickerIndicatorOwnerDisabledOrReadOnly() const = 0;
         virtual void pickerIndicatorChooseValue(const String&) = 0;
+        virtual void pickerIndicatorChooseValue(double) = 0;
         virtual bool setupDateTimeChooserParameters(DateTimeChooserParameters&) = 0;
     };
 
     static PassRefPtr<PickerIndicatorElement> create(Document&, PickerIndicatorOwner&);
     virtual ~PickerIndicatorElement();
     void openPopup();
     void closePopup();
     virtual bool willRespondToMouseClickEvents() OVERRIDE;
     void removePickerIndicatorOwner() { m_pickerIndicatorOwner = 0; }
 
     // DateTimeChooserClient implementation.
     virtual void didChooseValue(const String&) OVERRIDE;
+    virtual void didChooseValue(double) OVERRIDE;
     virtual void didEndChooser() OVERRIDE;
 
 private:
     PickerIndicatorElement(Document&, PickerIndicatorOwner&);
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
     virtual void defaultEventHandler(Event*) OVERRIDE;
     virtual void detach(const AttachContext& = AttachContext()) OVERRIDE;
     virtual bool isPickerIndicatorElement() const OVERRIDE;
 
     HTMLInputElement* hostInput();
 
     PickerIndicatorOwner* m_pickerIndicatorOwner;
     RefPtr<DateTimeChooser> m_chooser;
 };
 
 inline PickerIndicatorElement* toPickerIndicatorElement(Element* element)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!element || element->isPickerIndicatorElement());
     return static_cast<PickerIndicatorElement*>(element);
 }
 
 }
 #endif
 #endif