Revert of Update mojo sdk to rev c02a28868825edfa57ab77947b8cb15e741c5598

third_party/mojo/src/mojo/edk/system/mutex.cc

Index: third_party/mojo/src/mojo/edk/system/mutex.cc
diff --git a/third_party/mojo/src/mojo/edk/system/mutex.cc b/third_party/mojo/src/mojo/edk/system/mutex.cc
deleted file mode 100644
index 216b35a0388446f0ae910ac0e068af8ae0720616..0000000000000000000000000000000000000000
--- a/third_party/mojo/src/mojo/edk/system/mutex.cc
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright 2014 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 "mojo/edk/system/mutex.h"
-
-#if !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)
-
-#include "base/logging.h"
-
-namespace mojo {
-namespace system {
-
-Mutex::Mutex() : lock_() {
-}
-
-Mutex::~Mutex() {
-  DCHECK(owning_thread_ref_.is_null());
-}
-
-void Mutex::AssertHeld() const {
-  DCHECK(owning_thread_ref_ == base::PlatformThread::CurrentRef());
-}
-
-void Mutex::CheckHeldAndUnmark() {
-  DCHECK(owning_thread_ref_ == base::PlatformThread::CurrentRef());
-  owning_thread_ref_ = base::PlatformThreadRef();
-}
-
-void Mutex::CheckUnheldAndMark() {
-  DCHECK(owning_thread_ref_.is_null());
-  owning_thread_ref_ = base::PlatformThread::CurrentRef();
-}
-
-}  // namespace system
-}  // namespace mojo
-
-#endif  // !NDEBUG || DCHECK_ALWAYS_ON