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

Source/core/css/StyleResolver.cpp

Index: Source/core/css/StyleResolver.cpp
diff --git a/Source/core/css/StyleResolver.cpp b/Source/core/css/StyleResolver.cpp
index a360ef0514091e01cb3585741fd8d2124c1ef5ed..6b497cd5cc15db3331d21bad26106bff50c4f1a0 100644
--- a/Source/core/css/StyleResolver.cpp
+++ b/Source/core/css/StyleResolver.cpp
@@ -718,8 +718,8 @@ bool StyleResolver::styleSharingCandidateMatchesRuleSet(RuleSet* ruleSet)
 bool StyleResolver::canShareStyleWithControl(StyledElement* element) const
 {
     const State& state = m_state;
-    HTMLInputElement* thisInputElement = element->toInputElement();
-    HTMLInputElement* otherInputElement = state.element()->toInputElement();
+    Handle<HTMLInputElement> thisInputElement = element->toInputElement();
+    Handle<HTMLInputElement> otherInputElement = state.element()->toInputElement();
 
     if (!thisInputElement || !otherInputElement)
         return false;