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

Source/core/html/ImageInputType.cpp

Index: Source/core/html/ImageInputType.cpp
diff --git a/Source/core/html/ImageInputType.cpp b/Source/core/html/ImageInputType.cpp
index eef34da59eb1f6da35ce1424a3d174a3b124675e..172440bcb870b5c51ff14b7e53e7905f12f2a94d 100644
--- a/Source/core/html/ImageInputType.cpp
+++ b/Source/core/html/ImageInputType.cpp
@@ -39,12 +39,12 @@ namespace WebCore {
 
 using namespace HTMLNames;
 
-inline ImageInputType::ImageInputType(HTMLInputElement* element)
+inline ImageInputType::ImageInputType(Handle<HTMLInputElement> element)
     : BaseButtonInputType(element)
 {
 }
 
-PassOwnPtr<InputType> ImageInputType::create(HTMLInputElement* element)
+PassOwnPtr<InputType> ImageInputType::create(Handle<HTMLInputElement> element)
 {
     return adoptPtr(new ImageInputType(element));
 }
@@ -87,7 +87,7 @@ bool ImageInputType::supportsValidation() const
 
 void ImageInputType::handleDOMActivateEvent(Event* event)
 {
-    RefPtr<HTMLInputElement> element = this->element();
+    Handle<HTMLInputElement> element = this->element();
     if (element->isDisabledFormControl() || !element->form())
         return;
     element->setActivatedSubmit(true);
@@ -103,7 +103,7 @@ void ImageInputType::handleDOMActivateEvent(Event* event)
 
 RenderObject* ImageInputType::createRenderer(RenderArena* arena, RenderStyle*) const
 {
-    RenderImage* image = new (arena) RenderImage(element());
+    RenderImage* image = new (arena) RenderImage(Handle<HTMLInputElement>(element()).raw());
     image->setImageResource(RenderImageResource::create());
     return image;
 }
@@ -173,7 +173,7 @@ bool ImageInputType::shouldRespectHeightAndWidthAttributes()
 
 unsigned ImageInputType::height() const
 {
-    RefPtr<HTMLInputElement> element = this->element();
+    Handle<HTMLInputElement> element = this->element();
 
     if (!element->renderer()) {
         // Check the attribute first for an explicit pixel value.
@@ -197,7 +197,7 @@ unsigned ImageInputType::height() const
 
 unsigned ImageInputType::width() const
 {
-    RefPtr<HTMLInputElement> element = this->element();
+    Handle<HTMLInputElement> element = this->element();
 
     if (!element->renderer()) {
         // Check the attribute first for an explicit pixel value.