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

Source/core/editing/FrameSelection.cpp

Index: Source/core/editing/FrameSelection.cpp
diff --git a/Source/core/editing/FrameSelection.cpp b/Source/core/editing/FrameSelection.cpp
index a67df3694d563d68a2790993257045d507a096ab..ca29e1eb132312f4f17a9b264b72d346d18ee5ac 100644
--- a/Source/core/editing/FrameSelection.cpp
+++ b/Source/core/editing/FrameSelection.cpp
@@ -1598,7 +1598,7 @@ void FrameSelection::selectAll()
     Document* document = m_frame->document();
 
     if (document->focusedNode() && document->focusedNode()->hasTagName(selectTag)) {
-        HTMLSelectElement* selectElement = toHTMLSelectElement(document->focusedNode());
+        Handle<HTMLSelectElement> selectElement = toHTMLSelectElement(document->focusedNode());
         if (selectElement->canSelectAll()) {
             selectElement->selectAll();
             return;
@@ -1661,8 +1661,8 @@ bool FrameSelection::setSelectedRange(Range* range, EAffinity affinity, bool clo
 
 bool FrameSelection::isInPasswordField() const
 {
-    HTMLTextFormControlElement* textControl = enclosingTextFormControl(start());
-    return textControl && textControl->hasTagName(inputTag) && static_cast<HTMLInputElement*>(textControl)->isPasswordField();
+    Handle<HTMLTextFormControlElement> textControl = enclosingTextFormControl(start());
+    return textControl && textControl->hasTagName(inputTag) && Handle<HTMLInputElement>::cast(textControl)->isPasswordField();
 }
 
 void FrameSelection::focusedOrActiveStateChanged()
@@ -1825,7 +1825,7 @@ void FrameSelection::notifyRendererOfSelectionChange(EUserTriggered userTriggere
 {
     m_frame->document()->updateStyleIfNeeded();
 
-    if (HTMLTextFormControlElement* textControl = enclosingTextFormControl(start()))
+    if (Handle<HTMLTextFormControlElement> textControl = enclosingTextFormControl(start()))
         textControl->selectionChanged(userTriggered == UserTriggered);
 }