diff -r 000000000000 -r 6474c204b198 content/base/src/nsHostObjectURI.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/src/nsHostObjectURI.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,56 @@
+/* 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 nsHostObjectURI_h
+#define nsHostObjectURI_h
+
+#include "mozilla/Attributes.h"
+#include "nsCOMPtr.h"
+#include "nsIClassInfo.h"
+#include "nsIPrincipal.h"
+#include "nsISerializable.h"
+#include "nsIURIWithPrincipal.h"
+#include "nsSimpleURI.h"
+
+/**
+ * These URIs refer to host objects: Blobs, with scheme "blob",
+ * MediaStreams, with scheme "mediastream", and MediaSources, with scheme
+ * "mediasource".
+ */
+class nsHostObjectURI : public nsSimpleURI,
+                        public nsIURIWithPrincipal
+{
+public:
+  nsHostObjectURI(nsIPrincipal* aPrincipal) :
+      nsSimpleURI(), mPrincipal(aPrincipal)
+  {}
+  virtual ~nsHostObjectURI() {}
+
+  // For use only from deserialization
+  nsHostObjectURI() : nsSimpleURI() {}
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_NSIURIWITHPRINCIPAL
+  NS_DECL_NSISERIALIZABLE
+  NS_DECL_NSICLASSINFO
+
+  // Override CloneInternal() and EqualsInternal()
+  virtual nsresult CloneInternal(RefHandlingEnum aRefHandlingMode,
+                                 nsIURI** aClone) MOZ_OVERRIDE;
+  virtual nsresult EqualsInternal(nsIURI* aOther,
+                                  RefHandlingEnum aRefHandlingMode,
+                                  bool* aResult) MOZ_OVERRIDE;
+
+  // Override StartClone to hand back a nsHostObjectURI
+  virtual nsSimpleURI* StartClone(RefHandlingEnum /* unused */) MOZ_OVERRIDE
+  { return new nsHostObjectURI(); }
+
+  nsCOMPtr<nsIPrincipal> mPrincipal;
+};
+
+#define NS_HOSTOBJECTURI_CID \
+{ 0xf5475c51, 0x59a7, 0x4757, \
+  { 0xb3, 0xd9, 0xe2, 0x11, 0xa9, 0x41, 0x08, 0x72 } }
+
+#endif /* nsHostObjectURI_h */