Oilpan: Prepare to move ImageLoader and its subclasses to Oilpan heap.

Source/core/html/HTMLInputElement.cpp

Index: Source/core/html/HTMLInputElement.cpp
diff --git a/Source/core/html/HTMLInputElement.cpp b/Source/core/html/HTMLInputElement.cpp
index 717d8d43f9997fb12dab13d87ed7c98d243c1f97..93bdfa8f13651e06e5f19bd5ba564441e914b327 100644
--- a/Source/core/html/HTMLInputElement.cpp
+++ b/Source/core/html/HTMLInputElement.cpp
@@ -142,13 +142,14 @@ void HTMLInputElement::trace(Visitor* visitor)
     visitor->trace(m_inputType);
     visitor->trace(m_inputTypeView);
     visitor->trace(m_listAttributeTargetObserver);
+    visitor->trace(m_imageLoader);
     HTMLTextFormControlElement::trace(visitor);
 }
 
 HTMLImageLoader* HTMLInputElement::imageLoader()
 {
     if (!m_imageLoader)
-        m_imageLoader = adoptPtr(new HTMLImageLoader(this));
+        m_imageLoader = HTMLImageLoader::create(this);
     return m_imageLoader.get();
 }