Revert 148069 and 148060 to see if they were responsible for a perf regression

Source/WebCore/loader/DocumentLoader.h

Index: Source/WebCore/loader/DocumentLoader.h
diff --git a/Source/WebCore/loader/DocumentLoader.h b/Source/WebCore/loader/DocumentLoader.h
index 929424151803ec633b8225a947033f2a23371fa1..816a2da1e0bdf6f299bed14ee6e56941666860ca 100644
--- a/Source/WebCore/loader/DocumentLoader.h
+++ b/Source/WebCore/loader/DocumentLoader.h
@@ -157,8 +157,8 @@ namespace WebCore {
         bool isLoadingMultipartContent() const { return m_isLoadingMultipartContent; }
 
         void stopLoadingSubresources();
-        void addResourceLoader(ResourceLoader*);
-        void removeResourceLoader(ResourceLoader*);
+        void addSubresourceLoader(ResourceLoader*);
+        void removeSubresourceLoader(ResourceLoader*);
 
         void subresourceLoaderFinishedLoadingOnePart(ResourceLoader*);
 
@@ -248,8 +248,8 @@ namespace WebCore {
         RefPtr<CachedResourceLoader> m_cachedResourceLoader;
 
         CachedResourceHandle<CachedRawResource> m_mainResource;
-        ResourceLoaderSet m_resourceLoaders;
-        ResourceLoaderSet m_multipartResourceLoaders;
+        ResourceLoaderSet m_subresourceLoaders;
+        ResourceLoaderSet m_multipartSubresourceLoaders;
         
         mutable DocumentWriter m_writer;