Merge 87756

Source/WebCore/platform/mac/HTMLConverter.mm

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1735 matching lines @@
     return nil;
 }
 
 static NSFileWrapper *fileWrapperForElement(Element* element)
 {
     NSFileWrapper *wrapper = nil;
     
     const AtomicString& attr = element->getAttribute(srcAttr);
     if (!attr.isEmpty()) {
         NSURL *URL = element->document()->completeURL(attr);
-        wrapper = fileWrapperForURL(element->document()->loader(), URL);
+        if (DocumentLoader* loader = element->document()->loader())
+            wrapper = fileWrapperForURL(loader, URL);
     }
     if (!wrapper) {
         RenderImage* renderer = toRenderImage(element->renderer());
         if (renderer->cachedImage() && !renderer->cachedImage()->errorOccurred()) {
             wrapper = [[NSFileWrapper alloc] initRegularFileWithContents:(NSData *)(renderer->cachedImage()->image()->getTIFFRepresentation())];
             [wrapper setPreferredFilename:@"image.tiff"];
             [wrapper autorelease];
         }
     }
 
     return wrapper;
 }