diff -r 000000000000 -r 6474c204b198 intl/lwbrk/src/nsUniscribeBreaker.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/lwbrk/src/nsUniscribeBreaker.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,58 @@
+/* -*- 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/. */
+
+#include "nsComplexBreaker.h"
+
+#include <windows.h>
+
+#include <usp10.h>
+
+#include "nsUTF8Utils.h"
+#include "nsString.h"
+#include "nsTArray.h"
+
+void
+NS_GetComplexLineBreaks(const char16_t* aText, uint32_t aLength,
+                        uint8_t* aBreakBefore)
+{
+  NS_ASSERTION(aText, "aText shouldn't be null"); 
+
+  int outItems = 0;
+  HRESULT result;
+  nsAutoTArray<SCRIPT_ITEM, 64> items;
+  char16ptr_t text = aText;
+
+  memset(aBreakBefore, false, aLength);
+
+  if (!items.AppendElements(64))
+    return;
+
+  do {
+    result = ScriptItemize(text, aLength, items.Length(), nullptr, nullptr,
+                           items.Elements(), &outItems);
+
+    if (result == E_OUTOFMEMORY) {
+      if (!items.AppendElements(items.Length()))
+        return;
+    }
+  } while (result == E_OUTOFMEMORY);
+
+  for (int iItem = 0; iItem < outItems; ++iItem)  {
+    uint32_t endOffset = (iItem + 1 == outItems ? aLength : items[iItem + 1].iCharPos);
+    uint32_t startOffset = items[iItem].iCharPos;
+    nsAutoTArray<SCRIPT_LOGATTR, 64> sla;
+    
+    if (!sla.AppendElements(endOffset - startOffset))
+      return;
+
+    if (ScriptBreak(text + startOffset, endOffset - startOffset,
+                    &items[iItem].a,  sla.Elements()) < 0) 
+      return;
+
+    for (uint32_t j=0; j+startOffset < endOffset; ++j) {
+       aBreakBefore[j+startOffset] = sla[j].fSoftBreak;
+    }
+  }
+}