diff -r 000000000000 -r 6474c204b198 layout/xul/nsBoxLayoutState.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/xul/nsBoxLayoutState.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+//
+// Eric Vaughan
+// Netscape Communications
+//
+// See documentation in associated header file
+//
+
+#include "nsBoxLayoutState.h"
+
+nsBoxLayoutState::nsBoxLayoutState(nsPresContext* aPresContext,
+                                   nsRenderingContext* aRenderingContext,
+                                   const nsHTMLReflowState* aOuterReflowState,
+                                   uint16_t aReflowDepth)
+  : mPresContext(aPresContext)
+  , mRenderingContext(aRenderingContext)
+  , mOuterReflowState(aOuterReflowState)
+  , mLayoutFlags(0)
+  , mReflowDepth(aReflowDepth)
+  , mPaintingDisabled(false)
+{
+  NS_ASSERTION(mPresContext, "PresContext must be non-null");
+}
+
+nsBoxLayoutState::nsBoxLayoutState(const nsBoxLayoutState& aState)
+  : mPresContext(aState.mPresContext)
+  , mRenderingContext(aState.mRenderingContext)
+  , mOuterReflowState(aState.mOuterReflowState)
+  , mLayoutFlags(aState.mLayoutFlags)
+  , mReflowDepth(aState.mReflowDepth + 1)
+  , mPaintingDisabled(aState.mPaintingDisabled)
+{
+  NS_ASSERTION(mPresContext, "PresContext must be non-null");
+}