Make multipart image documents work again.

Source/core/fetch/ResourceLoader.h

 /*
  * Copyright (C) 2005, 2006, 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
@@ skipping 11 matching lines @@
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ResourceLoader_h
 #define ResourceLoader_h
 
+#include "core/CoreExport.h"
 #include "core/fetch/ResourceLoaderOptions.h"
 #include "platform/network/ResourceRequest.h"
 #include "public/platform/WebURLLoader.h"
 #include "public/platform/WebURLLoaderClient.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 class Resource;
 class KURL;
 class ResourceError;
 class ResourceFetcher;
 class ThreadedDataReceiver;
 
-class ResourceLoader final : public RefCountedWillBeGarbageCollectedFinalized<ResourceLoader>, protected WebURLLoaderClient {
+class CORE_EXPORT ResourceLoader final : public RefCountedWillBeGarbageCollectedFinalized<ResourceLoader>, protected WebURLLoaderClient {
 public:
     static PassRefPtrWillBeRawPtr<ResourceLoader> create(ResourceFetcher*, Resource*, const ResourceRequest&, const ResourceLoaderOptions&);
     virtual ~ResourceLoader();
     DECLARE_TRACE();
 
     void start();
     void changeToSynchronous();
 
     void cancel();
     void cancel(const ResourceError&);
@@ skipping 21 matching lines @@
     void didFinishLoading(WebURLLoader*, double finishTime, int64_t encodedDataLength) override;
     void didFail(WebURLLoader*, const WebURLError&) override;
     void didDownloadData(WebURLLoader*, int, int) override;
 
     const KURL& url() const { return m_request.url(); }
     bool isLoadedBy(ResourceFetcher*) const;
 
     bool reachedTerminalState() const { return m_state == Terminated; }
     const ResourceRequest& request() const { return m_request; }
 
+    bool loadingMultipartContent() const { return m_loadingMultipartContent; }
+
 private:
     ResourceLoader(ResourceFetcher*, Resource*, const ResourceLoaderOptions&);
 
     void init(const ResourceRequest&);
     void requestSynchronously();
 
     void didFinishLoadingOnePart(double finishTime, int64_t encodedDataLength);
 
     bool responseNeedsAccessControlCheck() const;
 
     ResourceRequest& applyOptions(ResourceRequest&) const;
 
     OwnPtr<WebURLLoader> m_loader;
     RefPtrWillBeMember<ResourceFetcher> m_fetcher;
 
     ResourceRequest m_request;
     ResourceRequest m_originalRequest; // Before redirects.
 
     bool m_notifiedLoadComplete;
 
     bool m_defersLoading;
+    bool m_loadingMultipartContent;
     OwnPtr<ResourceRequest> m_fallbackRequestForServiceWorker;
     ResourceRequest m_deferredRequest;
     ResourceLoaderOptions m_options;
 
     enum ResourceLoaderState {
         Initialized,
         Finishing,
         Terminated
     };
 
@@ skipping 11 matching lines @@
     ResourceLoaderState m_state;
 
     // Used for sanity checking to make sure we don't experience illegal state
     // transitions.
     ConnectionState m_connectionState;
 };
 
 }
 
 #endif