diff -r 000000000000 -r 6474c204b198 netwerk/base/src/nsAsyncStreamCopier.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/base/src/nsAsyncStreamCopier.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,81 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsAsyncStreamCopier_h__
+#define nsAsyncStreamCopier_h__
+
+#include "nsIAsyncStreamCopier.h"
+#include "nsIAsyncStreamCopier2.h"
+#include "mozilla/Mutex.h"
+#include "nsStreamUtils.h"
+#include "nsCOMPtr.h"
+
+class nsIRequestObserver;
+
+//-----------------------------------------------------------------------------
+
+class nsAsyncStreamCopier : public nsIAsyncStreamCopier, nsIAsyncStreamCopier2
+{
+public:
+    NS_DECL_THREADSAFE_ISUPPORTS
+    NS_DECL_NSIREQUEST
+    NS_DECL_NSIASYNCSTREAMCOPIER
+
+    // nsIAsyncStreamCopier2
+    // We declare it by hand instead of NS_DECL_NSIASYNCSTREAMCOPIER2
+    // as nsIAsyncStreamCopier2 duplicates methods of nsIAsyncStreamCopier
+    NS_IMETHOD Init(nsIInputStream *aSource,
+                    nsIOutputStream *aSink,
+                    nsIEventTarget *aTarget,
+                    uint32_t aChunkSize,
+                    bool aCloseSource,
+                    bool aCloseSink);
+
+    nsAsyncStreamCopier();
+    virtual ~nsAsyncStreamCopier();
+
+    //-------------------------------------------------------------------------
+    // these methods may be called on any thread
+
+    bool IsComplete(nsresult *status = nullptr);
+    void   Complete(nsresult status);
+
+private:
+    nsresult InitInternal(nsIInputStream *source,
+                          nsIOutputStream *sink,
+                          nsIEventTarget *target,
+                          uint32_t chunkSize,
+                          bool closeSource,
+                          bool closeSink);
+
+    static void OnAsyncCopyComplete(void *, nsresult);
+
+    void AsyncCopyInternal();
+    nsresult ApplyBufferingPolicy();
+    nsIRequest* AsRequest();
+
+    nsCOMPtr<nsIInputStream>       mSource;
+    nsCOMPtr<nsIOutputStream>      mSink;
+
+    nsCOMPtr<nsIRequestObserver>   mObserver;
+
+    nsCOMPtr<nsIEventTarget>       mTarget;
+
+    nsCOMPtr<nsISupports>          mCopierCtx;
+
+    mozilla::Mutex                 mLock;
+
+    nsAsyncCopyMode                mMode;
+    uint32_t                       mChunkSize;
+    nsresult                       mStatus;
+    bool                           mIsPending;
+    bool                           mCloseSource;
+    bool                           mCloseSink;
+    bool                           mShouldSniffBuffering;
+
+    friend class ProceedWithAsyncCopy;
+    friend class AsyncApplyBufferingPolicyEvent;
+};
+
+#endif // !nsAsyncStreamCopier_h__