diff -r 000000000000 -r 6474c204b198 ipc/chromium/src/base/logging.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/chromium/src/base/logging.cc	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,105 @@
+// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/logging.h"
+#include "prmem.h"
+#include "prprf.h"
+#include "base/string_util.h"
+#include "nsXPCOM.h"
+
+namespace mozilla {
+
+Logger::~Logger()
+{
+  PRLogModuleLevel prlevel = PR_LOG_DEBUG;
+  int xpcomlevel = -1;
+
+  switch (mSeverity) {
+  case LOG_INFO:
+    prlevel = PR_LOG_DEBUG;
+    xpcomlevel = -1;
+    break;
+
+  case LOG_WARNING:
+    prlevel = PR_LOG_WARNING;
+    xpcomlevel = NS_DEBUG_WARNING;
+    break;
+
+  case LOG_ERROR:
+    prlevel = PR_LOG_ERROR;
+    xpcomlevel = NS_DEBUG_WARNING;
+    break;
+
+  case LOG_ERROR_REPORT:
+    prlevel = PR_LOG_ERROR;
+    xpcomlevel = NS_DEBUG_ASSERTION;
+    break;
+
+  case LOG_FATAL:
+    prlevel = PR_LOG_ERROR;
+    xpcomlevel = NS_DEBUG_ABORT;
+    break;
+  }
+
+  PR_LOG(GetLog(), prlevel, ("%s:%i: %s", mFile, mLine, mMsg ? mMsg : "<no message>"));
+  if (xpcomlevel != -1)
+    NS_DebugBreak(xpcomlevel, mMsg, NULL, mFile, mLine);
+
+  PR_Free(mMsg);
+}
+
+void
+Logger::printf(const char* fmt, ...)
+{
+  va_list args;
+  va_start(args, fmt);
+  mMsg = PR_vsprintf_append(mMsg, fmt, args);
+  va_end(args);
+}
+
+PRLogModuleInfo* Logger::gChromiumPRLog;
+
+PRLogModuleInfo* Logger::GetLog()
+{
+  if (!gChromiumPRLog)
+    gChromiumPRLog = PR_NewLogModule("chromium");
+  return gChromiumPRLog;
+}
+
+} // namespace mozilla 
+
+mozilla::Logger&
+operator<<(mozilla::Logger& log, const char* s)
+{
+  log.printf("%s", s);
+  return log;
+}
+
+mozilla::Logger&
+operator<<(mozilla::Logger& log, const std::string& s)
+{
+  log.printf("%s", s.c_str());
+  return log;
+}
+
+mozilla::Logger&
+operator<<(mozilla::Logger& log, int i)
+{
+  log.printf("%i", i);
+  return log;
+}
+
+mozilla::Logger&
+operator<<(mozilla::Logger& log, const std::wstring& s)
+{
+  log.printf("%s", WideToASCII(s).c_str());
+  return log;
+}
+
+mozilla::Logger&
+operator<<(mozilla::Logger& log, void* p)
+{
+  log.printf("%p", p);
+  return log;
+}