Oilpan: move LiveNodeList collections to the heap.

Source/web/WebElementCollection.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2014 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 25 matching lines @@
 #include "core/html/HTMLCollection.h"
 #include "public/web/WebElement.h"
 #include "wtf/PassRefPtr.h"
 
 using namespace WebCore;
 
 namespace blink {
 
 void WebElementCollection::reset()
 {
-    assign(0);
+    m_private.reset();
 }
 
 void WebElementCollection::assign(const WebElementCollection& other)
 {
-    HTMLCollection* p = const_cast<HTMLCollection*>(other.m_private);
-    if (p)
-        p->ref();
-    assign(p);
+    m_private = other.m_private;
 }
 
-WebElementCollection::WebElementCollection(const PassRefPtr<HTMLCollection>& col)
-    : m_private(static_cast<HTMLCollection*>(col.leakRef()))
+WebElementCollection::WebElementCollection(const PassRefPtrWillBeRawPtr<HTMLCollection>& col)
+    : m_private(col)
 {
 }
 
-void WebElementCollection::assign(HTMLCollection* p)
+WebElementCollection& WebElementCollection::operator=(const PassRefPtrWillBeRawPtr<HTMLCollection>& col)
 {
-    // p is already ref'd for us by the caller
-    if (m_private)
-        m_private->deref();
-    m_private = p;
+    m_private = col;
+    return *this;
 }
 
 unsigned WebElementCollection::length() const
 {
     return m_private->length();
 }
 
 WebElement WebElementCollection::nextItem() const
 {
     Element* element = m_private->item(m_current);
     if (element)
         m_current++;
     return WebElement(element);
 }
 
 WebElement WebElementCollection::firstItem() const
 {
     m_current = 0;
     return nextItem();
 }
 
 } // namespace blink