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

Source/core/rendering/RenderTheme.cpp

Index: Source/core/rendering/RenderTheme.cpp
diff --git a/Source/core/rendering/RenderTheme.cpp b/Source/core/rendering/RenderTheme.cpp
index d160a0fe79648dc653e0a048f7aca630d29085fb..6a72ea1dc0be62a5f78a356658d5917f0adbcdbc 100644
--- a/Source/core/rendering/RenderTheme.cpp
+++ b/Source/core/rendering/RenderTheme.cpp
@@ -724,7 +724,7 @@ bool RenderTheme::isChecked(const RenderObject* o) const
     if (!o->node())
         return false;
 
-    HTMLInputElement* inputElement = o->node()->toInputElement();
+    Handle<HTMLInputElement> inputElement = o->node()->toInputElement();
     if (!inputElement)
         return false;
 
@@ -736,7 +736,7 @@ bool RenderTheme::isIndeterminate(const RenderObject* o) const
     if (!o->node())
         return false;
 
-    HTMLInputElement* inputElement = o->node()->toInputElement();
+    Handle<HTMLInputElement> inputElement = o->node()->toInputElement();
     if (!inputElement)
         return false;
 
@@ -908,7 +908,7 @@ void RenderTheme::paintSliderTicks(RenderObject* o, const PaintInfo& paintInfo,
     if (!node)
         return;
 
-    HTMLInputElement* input = node->toInputElement();
+    Handle<HTMLInputElement> input = node->toInputElement();
     if (!input)
         return;
 
@@ -999,7 +999,7 @@ void RenderTheme::adjustProgressBarStyle(StyleResolver*, RenderStyle*, Element*)
 {
 }
 
-bool RenderTheme::shouldHaveSpinButton(HTMLInputElement* inputElement) const
+bool RenderTheme::shouldHaveSpinButton(Handle<HTMLInputElement> inputElement) const
 {
     return inputElement->isSteppable() && !inputElement->isRangeControl();
 }