diff -r 000000000000 -r 6474c204b198 dom/indexedDB/ReportInternalError.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/indexedDB/ReportInternalError.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,32 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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 "ReportInternalError.h"
+
+#include "mozilla/IntegerPrintfMacros.h"
+
+#include "nsContentUtils.h"
+#include "nsPrintfCString.h"
+
+BEGIN_INDEXEDDB_NAMESPACE
+
+void
+ReportInternalError(const char* aFile, uint32_t aLine, const char* aStr)
+{
+  // Get leaf of file path
+  for (const char* p = aFile; *p; ++p) {
+    if (*p == '/' && *(p + 1)) {
+      aFile = p + 1;
+    }
+  }
+
+  nsContentUtils::LogSimpleConsoleError(
+    NS_ConvertUTF8toUTF16(nsPrintfCString(
+                          "IndexedDB %s: %s:%lu", aStr, aFile, aLine)),
+    "indexedDB");
+}
+
+END_INDEXEDDB_NAMESPACE