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diff --git a/js/src/methodjit/TrampolineCompiler.h b/js/src/methodjit/TrampolineCompiler.h
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=4 sw=4 et tw=99:
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Jaegermonkey.
+ *
+ * The Initial Developer of the Original Code is the Mozilla Foundation.
+ *
+ * Portions created by the Initial Developer are Copyright (C) 2010
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Andrew Drake <drakedevel@gmail.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#if !defined trampolines_h__ && defined JS_METHODJIT
+#define trampolines_h__
+
+#include "assembler/jit/ExecutableAllocator.h"
+#include "methodjit/CodeGenIncludes.h"
+
+namespace js {
+namespace mjit {
+
+class TrampolineCompiler
+{
+    typedef bool (*TrampolineGenerator)(Assembler &masm);
+
+public:
+    TrampolineCompiler(JSC::ExecutableAllocator *pool, Trampolines *tramps)
+      : execPool(pool), trampolines(tramps)
+    { }
+
+    bool compile();
+    static void release(Trampolines *tramps);
+
+private:
+    bool compileTrampoline(Trampolines::TrampolinePtr *where, JSC::ExecutablePool **pool,
+                           TrampolineGenerator generator);
+    
+    /* Generators for trampolines. */
+    static bool generateForceReturn(Assembler &masm);
+
+#if (defined(JS_NO_FASTCALL) && defined(JS_CPU_X86)) || defined(_WIN64)
+    static bool generateForceReturnFast(Assembler &masm);
+#endif
+
+    JSC::ExecutableAllocator *execPool;
+    Trampolines *trampolines;
+};
+
+} /* namespace mjit */
+} /* namespace js */
+
+#endif
+