Oilpan: switch ImageLoader to be prefinalized.

Source/core/loader/ImageLoader.cpp

Index: Source/core/loader/ImageLoader.cpp
diff --git a/Source/core/loader/ImageLoader.cpp b/Source/core/loader/ImageLoader.cpp
index 9f80239030c44ff3c069cdab32c63a32bc1f6e54..14887644c1ce3d4d850b1ba6e71b9d6628aa4a06 100644
--- a/Source/core/loader/ImageLoader.cpp
+++ b/Source/core/loader/ImageLoader.cpp
@@ -148,10 +148,20 @@ ImageLoader::ImageLoader(Element* element)
     , m_highPriorityClientCount(0)
 {
     WTF_LOG(Timers, "new ImageLoader %p", this);
+#if ENABLE(OILPAN)
+    ThreadState::current()->registerPreFinalizer(this);
+#endif
 }
 
 ImageLoader::~ImageLoader()
 {
+#if !ENABLE(OILPAN)
+    dispose();
+#endif
+}
+
+void ImageLoader::dispose()
+{
     WTF_LOG(Timers, "~ImageLoader %p; m_hasPendingLoadEvent=%d, m_hasPendingErrorEvent=%d",
         this, m_hasPendingLoadEvent, m_hasPendingErrorEvent);