diff -r 000000000000 -r 6474c204b198 parser/html/nsHtml5TreeOpStage.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parser/html/nsHtml5TreeOpStage.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,54 @@
+/* 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 nsHtml5TreeOpStage_h
+#define nsHtml5TreeOpStage_h
+
+#include "mozilla/Mutex.h"
+#include "nsHtml5TreeOperation.h"
+#include "nsTArray.h"
+#include "nsAHtml5TreeOpSink.h"
+#include "nsHtml5SpeculativeLoad.h"
+
+class nsHtml5TreeOpStage : public nsAHtml5TreeOpSink {
+  public:
+  
+    nsHtml5TreeOpStage();
+    
+    virtual ~nsHtml5TreeOpStage();
+  
+    /**
+     * Flush the operations from the tree operations from the argument
+     * queue unconditionally.
+     */
+    virtual void MoveOpsFrom(nsTArray<nsHtml5TreeOperation>& aOpQueue);
+    
+    /**
+     * Retrieve the staged operations and speculative loads into the arguments.
+     */
+    void MoveOpsAndSpeculativeLoadsTo(nsTArray<nsHtml5TreeOperation>& aOpQueue,
+        nsTArray<nsHtml5SpeculativeLoad>& aSpeculativeLoadQueue);
+
+    /**
+     * Move the speculative loads from the argument into the staging queue.
+     */
+    void MoveSpeculativeLoadsFrom(nsTArray<nsHtml5SpeculativeLoad>& aSpeculativeLoadQueue);
+
+    /**
+     * Retrieve the staged speculative loads into the argument.
+     */
+    void MoveSpeculativeLoadsTo(nsTArray<nsHtml5SpeculativeLoad>& aSpeculativeLoadQueue);
+
+#ifdef DEBUG
+    void AssertEmpty();
+#endif
+
+  private:
+    nsTArray<nsHtml5TreeOperation> mOpQueue;
+    nsTArray<nsHtml5SpeculativeLoad> mSpeculativeLoadQueue;
+    mozilla::Mutex mMutex;
+    
+};
+
+#endif /* nsHtml5TreeOpStage_h */