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

Source/core/rendering/RenderSearchField.cpp

Index: Source/core/rendering/RenderSearchField.cpp
diff --git a/Source/core/rendering/RenderSearchField.cpp b/Source/core/rendering/RenderSearchField.cpp
index 2c78be97c59c6c842a15d930ee091f6c5ac85e56..b388b469000283017679aa5d6d036f6192eadaa1 100644
--- a/Source/core/rendering/RenderSearchField.cpp
+++ b/Source/core/rendering/RenderSearchField.cpp
@@ -83,7 +83,7 @@ inline HTMLElement* RenderSearchField::cancelButtonElement() const
 
 void RenderSearchField::addSearchResult()
 {
-    HTMLInputElement* input = inputElement();
+    Handle<HTMLInputElement> input = inputElement();
     if (input->maxResults() <= 0)
         return;
 
@@ -125,7 +125,7 @@ void RenderSearchField::showPopup()
     m_searchPopup->loadRecentSearches(name, m_recentSearches);
 
     // Trim the recent searches list if the maximum size has changed since we last saved.
-    HTMLInputElement* input = inputElement();
+    Handle<HTMLInputElement> input = inputElement();
     if (static_cast<int>(m_recentSearches.size()) > input->maxResults()) {
         do {
             m_recentSearches.removeLast();
@@ -202,7 +202,7 @@ const AtomicString& RenderSearchField::autosaveName() const
 void RenderSearchField::valueChanged(unsigned listIndex, bool fireEvents)
 {
     ASSERT(static_cast<int>(listIndex) < listSize());
-    HTMLInputElement* input = inputElement();
+    Handle<HTMLInputElement> input = inputElement();
     if (static_cast<int>(listIndex) == (listSize() - 1)) {
         if (fireEvents) {
             m_recentSearches.clear();