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

mojo/public/cpp/utility/thread.h

-// 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.
-
-#ifndef MOJO_PUBLIC_CPP_UTILITY_THREAD_H_
-#define MOJO_PUBLIC_CPP_UTILITY_THREAD_H_
-
-#ifdef _WIN32
-#error "Not implemented: See crbug.com/342893."
-#endif
-
-#include <pthread.h>
-#include <stddef.h>
-
-#include "base/macros.h"
-
-namespace mojo {
-
-// This class is thread-friendly, not thread-safe (e.g., you mustn't call
-// |Join()| from multiple threads and/or simultaneously try to destroy the
-// object).
-class Thread {
- public:
-  // TODO(vtl): Support non-joinable? priority?
-  class Options {
-   public:
-    Options() : stack_size_(0) {}
-
-    // A stack size of 0 means the default.
-    size_t stack_size() const { return stack_size_; }
-    void set_stack_size(size_t stack_size) { stack_size_ = stack_size; }
-
-   private:
-    size_t stack_size_;
-
-    // Copy and assign allowed.
-  };
-
-  // TODO(vtl): Add name or name prefix?
-  Thread();
-  explicit Thread(const Options& options);
-  virtual ~Thread();
-
-  void Start();
-  void Join();
-
-  virtual void Run() = 0;
-
- private:
-  static void* ThreadRunTrampoline(void* arg);
-
-  const Options options_;
-  pthread_t thread_;
-  bool started_;
-  bool joined_;
-
-  DISALLOW_COPY_AND_ASSIGN(Thread);
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_CPP_UTILITY_THREAD_H_