Set element value to its default value on reset

Source/core/html/forms/TextFieldInputType.cpp

Index: Source/core/html/forms/TextFieldInputType.cpp
diff --git a/Source/core/html/forms/TextFieldInputType.cpp b/Source/core/html/forms/TextFieldInputType.cpp
index ac8286164d5bd8907342d46aaa65ff04c518e268..cc71552776aa270dc95419603ea6ac9bb8ea7001 100644
--- a/Source/core/html/forms/TextFieldInputType.cpp
+++ b/Source/core/html/forms/TextFieldInputType.cpp
@@ -189,7 +189,7 @@ void TextFieldInputType::setValue(const String& sanitizedValue, bool valueChange
     }
 
     if (!input->focused())
-        input->setTextAsOfLastFormControlChangeEvent(sanitizedValue);
+        input->setTextAsOfLastFormControlChangeEvent(sanitizedValue.isNull() ? visibleValue() : sanitizedValue);

[tkent, 2014/11/10 01:54:39]

Why is it visibleValue(), instead of defaultValue()?

[Habib Virji, 2014/11/13 15:00:56]

As defaultValue() and sanitizedValue both hold null string.   

[tkent, 2014/11/14 00:23:56]

Using visibleValue() is semantically incorrect.  If you need a non-null empty
string, use emptyString() like HTMLTextFormControlElement::insertedInto does.

[Habib Virji, 2014/11/24 11:05:32]

Done.

 }
 
 void TextFieldInputType::handleKeydownEvent(KeyboardEvent* event)