diff --git a/quic/platform/api/quic_mutex.cc b/quic/platform/api/quic_mutex.cc
new file mode 100644
index 0000000..fc0c9b5
--- /dev/null
+++ b/quic/platform/api/quic_mutex.cc
@@ -0,0 +1,45 @@
+// Copyright (c) 2016 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 "net/third_party/quiche/src/quic/platform/api/quic_mutex.h"
+
+namespace quic {
+
+void QuicMutex::WriterLock() {
+  impl_.WriterLock();
+}
+
+void QuicMutex::WriterUnlock() {
+  impl_.WriterUnlock();
+}
+
+void QuicMutex::ReaderLock() {
+  impl_.ReaderLock();
+}
+
+void QuicMutex::ReaderUnlock() {
+  impl_.ReaderUnlock();
+}
+
+void QuicMutex::AssertReaderHeld() const {
+  impl_.AssertReaderHeld();
+}
+
+QuicReaderMutexLock::QuicReaderMutexLock(QuicMutex* lock) : lock_(lock) {
+  lock->ReaderLock();
+}
+
+QuicReaderMutexLock::~QuicReaderMutexLock() {
+  lock_->ReaderUnlock();
+}
+
+QuicWriterMutexLock::QuicWriterMutexLock(QuicMutex* lock) : lock_(lock) {
+  lock->WriterLock();
+}
+
+QuicWriterMutexLock::~QuicWriterMutexLock() {
+  lock_->WriterUnlock();
+}
+
+}  // namespace quic