Transfer date/time value to the chooser as a double

Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp

Index: Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp
diff --git a/Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp b/Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp
index 21d39a3312da26d7f03785b02abb83a62d036d86..c7a9aa5380c53cf980d68e72d8d58c3b3bb37915 100644
--- a/Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp
+++ b/Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp
@@ -97,6 +97,14 @@ void BaseChooserOnlyDateAndTimeInputType::didChooseValue(const String& value)
     element().setValue(value, DispatchInputAndChangeEvent);
 }
 
+void BaseChooserOnlyDateAndTimeInputType::didChooseValue(double value)
+{
+    if (std::isnan(value))
+        element().setValue(emptyString(), DispatchInputAndChangeEvent);
+    else
+        element().setValueAsNumber(value, ASSERT_NO_EXCEPTION, DispatchInputAndChangeEvent);
+}
+
 void BaseChooserOnlyDateAndTimeInputType::didEndChooser()
 {
     m_dateTimeChooser.clear();