[oilpan] Completely move HTMLFormControlElement's hierarchy to the managed heap

Source/core/html/BaseMultipleFieldsDateAndTimeInputType.cpp

Index: Source/core/html/BaseMultipleFieldsDateAndTimeInputType.cpp
diff --git a/Source/core/html/BaseMultipleFieldsDateAndTimeInputType.cpp b/Source/core/html/BaseMultipleFieldsDateAndTimeInputType.cpp
index 701fddfe3025b7f1459506f9be5946c71f068d04..5e7ce7595b8bdd50eee393b2738d1d6491eb760e 100644
--- a/Source/core/html/BaseMultipleFieldsDateAndTimeInputType.cpp
+++ b/Source/core/html/BaseMultipleFieldsDateAndTimeInputType.cpp
@@ -148,7 +148,7 @@ void BaseMultipleFieldsDateAndTimeInputType::didFocusOnControl()
 
 void BaseMultipleFieldsDateAndTimeInputType::editControlValueChanged()
 {
-    RefPtr<HTMLInputElement> input(element());
+    Handle<HTMLInputElement> input(element());
     String oldValue = input->value();
     String newValue = sanitizeValue(m_dateTimeEditElement->value());
     // Even if oldValue is null and newValue is "", we should assume they are same.
@@ -234,7 +234,7 @@ bool BaseMultipleFieldsDateAndTimeInputType::setupDateTimeChooserParameters(Date
     return element()->setupDateTimeChooserParameters(parameters);
 }
 
-BaseMultipleFieldsDateAndTimeInputType::BaseMultipleFieldsDateAndTimeInputType(HTMLInputElement* element)
+BaseMultipleFieldsDateAndTimeInputType::BaseMultipleFieldsDateAndTimeInputType(Handle<HTMLInputElement> element)
     : BaseDateAndTimeInputType(element)
     , m_dateTimeEditElement(0)
     , m_spinButtonElement(0)
@@ -567,7 +567,7 @@ bool BaseMultipleFieldsDateAndTimeInputType::shouldClearButtonRespondToMouseEven
 
 void BaseMultipleFieldsDateAndTimeInputType::clearValue()
 {
-    RefPtr<HTMLInputElement> input(element());
+    Handle<HTMLInputElement> input(element());
     input->setValue("", DispatchInputAndChangeEvent);
     input->updateClearButtonVisibility();
 }