Mojo C++ bindings: remove the utility/ folder.

mojo/public/cpp/utility/lib/mutex.cc

-// 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/public/cpp/utility/mutex.h"
-
-#include <assert.h>
-#include <errno.h>
-
-namespace mojo {
-
-// Release builds have inlined (non-error-checking) definitions in the header.
-#if !defined(NDEBUG)
-Mutex::Mutex() {
-  pthread_mutexattr_t mutexattr;
-  int rv = pthread_mutexattr_init(&mutexattr);
-  assert(rv == 0);
-  rv = pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_ERRORCHECK);
-  assert(rv == 0);
-  rv = pthread_mutex_init(&mutex_, &mutexattr);
-  assert(rv == 0);
-  rv = pthread_mutexattr_destroy(&mutexattr);
-  assert(rv == 0);
-}
-
-Mutex::~Mutex() {
-  int rv = pthread_mutex_destroy(&mutex_);
-  assert(rv == 0);
-}
-
-void Mutex::Lock() {
-  int rv = pthread_mutex_lock(&mutex_);
-  assert(rv == 0);
-}
-
-void Mutex::Unlock() {
-  int rv = pthread_mutex_unlock(&mutex_);
-  assert(rv == 0);
-}
-
-bool Mutex::TryLock() {
-  int rv = pthread_mutex_trylock(&mutex_);
-  assert(rv == 0 || rv == EBUSY);
-  return rv == 0;
-}
-
-void Mutex::AssertHeld() {
-  assert(pthread_mutex_lock(&mutex_) == EDEADLK);
-}
-#endif  // !defined(NDEBUG)
-
-}  // namespace mojo