diff -r 000000000000 -r 6474c204b198 js/src/jit/JitFrameIterator-inl.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit/JitFrameIterator-inl.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * 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 jit_JitFrameIterator_inl_h
+#define jit_JitFrameIterator_inl_h
+
+#ifdef JS_ION
+
+#include "jit/JitFrameIterator.h"
+
+#include "jit/Bailouts.h"
+#include "jit/BaselineFrame.h"
+
+namespace js {
+namespace jit {
+
+template <AllowGC allowGC>
+inline
+InlineFrameIteratorMaybeGC<allowGC>::InlineFrameIteratorMaybeGC(
+                                                JSContext *cx, const IonBailoutIterator *iter)
+  : frame_(iter),
+    framesRead_(0),
+    frameCount_(UINT32_MAX),
+    callee_(cx),
+    script_(cx)
+{
+    if (iter) {
+        start_ = SnapshotIterator(*iter);
+        findNextFrame();
+    }
+}
+
+inline BaselineFrame *
+JitFrameIterator::baselineFrame() const
+{
+    JS_ASSERT(isBaselineJS());
+    return (BaselineFrame *)(fp() - BaselineFrame::FramePointerOffset - BaselineFrame::Size());
+}
+
+} // namespace jit
+} // namespace js
+
+#endif // JS_ION
+
+#endif /* jit_JitFrameIterator_inl_h */