Prepare for date/time input datalist support

Source/core/html/forms/BaseMultipleFieldsDateAndTimeInputType.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 244 matching lines @@
 
     DateTimeEditElement* edit = this->dateTimeEditElement();
     if (!edit)
         return;
     DateComponents date;
     unsigned end;
     if (date.parseDate(value, 0, end) && end == value.length())
         edit->setOnlyYearMonthDay(date);
 }
 
+void BaseMultipleFieldsDateAndTimeInputType::pickerIndicatorChooseValue(double value)
+{
+    if (std::isnan(value))
+        element().setValue(String(), DispatchInputAndChangeEvent);

[tkent, 2013/11/07 01:43:10]

Ditto.

+    else
+        element().setValueAsNumber(value, ASSERT_NO_EXCEPTION, DispatchInputAndChangeEvent);
+}
+
 bool BaseMultipleFieldsDateAndTimeInputType::setupDateTimeChooserParameters(DateTimeChooserParameters& parameters)
 {
     return element().setupDateTimeChooserParameters(parameters);
 }
 
 BaseMultipleFieldsDateAndTimeInputType::BaseMultipleFieldsDateAndTimeInputType(HTMLInputElement& element)
     : BaseDateAndTimeInputType(element)
     , m_isDestroyingShadowSubtree(false)
     , m_pickerIndicatorIsVisible(false)
     , m_pickerIndicatorIsAlwaysVisible(false)
@@ skipping 322 matching lines @@
 
     if (element().isRequired() || !dateTimeEditElement()->anyEditableFieldsHaveValues())
         clearButton->setInlineStyleProperty(CSSPropertyVisibility, CSSValueHidden);
     else
         clearButton->removeInlineStyleProperty(CSSPropertyVisibility);
 }
 
 } // namespace WebCore
 
 #endif