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

Source/core/html/ColorInputType.cpp

Index: Source/core/html/ColorInputType.cpp
diff --git a/Source/core/html/ColorInputType.cpp b/Source/core/html/ColorInputType.cpp
index bffe7782b97bd87e7e924c762ca3c09fc1cd8797..e2f490d35ec83783f31050700e01516a2fa7940f 100644
--- a/Source/core/html/ColorInputType.cpp
+++ b/Source/core/html/ColorInputType.cpp
@@ -67,7 +67,7 @@ static bool isValidColorString(const String& value)
     return color.isValid() && !color.hasAlpha();
 }
 
-PassOwnPtr<InputType> ColorInputType::create(HTMLInputElement* element)
+PassOwnPtr<InputType> ColorInputType::create(Handle<HTMLInputElement> element)
 {
     return adoptPtr(new ColorInputType(element));
 }