diff -r 000000000000 -r 6474c204b198 ipc/chromium/src/base/ref_counted.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/chromium/src/base/ref_counted.cc	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,88 @@
+// Copyright (c) 2006-2008 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/ref_counted.h"
+
+#include "base/logging.h"
+#include "base/thread_collision_warner.h"
+
+namespace base {
+
+namespace subtle {
+
+RefCountedBase::RefCountedBase() : ref_count_(0) {
+#ifndef NDEBUG
+  in_dtor_ = false;
+#endif
+}
+
+RefCountedBase::~RefCountedBase() {
+#ifndef NDEBUG
+  DCHECK(in_dtor_) << "RefCounted object deleted without calling Release()";
+#endif
+}
+
+void RefCountedBase::AddRef() {
+  // TODO(maruel): Add back once it doesn't assert 500 times/sec.
+  // Current thread books the critical section "AddRelease" without release it.
+  // DFAKE_SCOPED_LOCK_THREAD_LOCKED(add_release_);
+#ifndef NDEBUG
+  DCHECK(!in_dtor_);
+#endif
+  ++ref_count_;
+}
+
+bool RefCountedBase::Release() {
+  // TODO(maruel): Add back once it doesn't assert 500 times/sec.
+  // Current thread books the critical section "AddRelease" without release it.
+  // DFAKE_SCOPED_LOCK_THREAD_LOCKED(add_release_);
+#ifndef NDEBUG
+  DCHECK(!in_dtor_);
+#endif
+  if (--ref_count_ == 0) {
+#ifndef NDEBUG
+    in_dtor_ = true;
+#endif
+    return true;
+  }
+  return false;
+}
+
+RefCountedThreadSafeBase::RefCountedThreadSafeBase() : ref_count_(0) {
+#ifndef NDEBUG
+  in_dtor_ = false;
+#endif
+}
+
+RefCountedThreadSafeBase::~RefCountedThreadSafeBase() {
+#ifndef NDEBUG
+  DCHECK(in_dtor_) << "RefCountedThreadSafe object deleted without "
+                      "calling Release()";
+#endif
+}
+
+void RefCountedThreadSafeBase::AddRef() {
+#ifndef NDEBUG
+  DCHECK(!in_dtor_);
+#endif
+  AtomicRefCountInc(&ref_count_);
+}
+
+bool RefCountedThreadSafeBase::Release() {
+#ifndef NDEBUG
+  DCHECK(!in_dtor_);
+  DCHECK(!AtomicRefCountIsZero(&ref_count_));
+#endif
+  if (!AtomicRefCountDec(&ref_count_)) {
+#ifndef NDEBUG
+    in_dtor_ = true;
+#endif
+    return true;
+  }
+  return false;
+}
+
+}  // namespace subtle
+
+}  // namespace base