Move thread from test/ to util/thread/.

test/thread.h

-// Copyright 2015 The Crashpad Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef CRASHPAD_TEST_THREAD_H_
-#define CRASHPAD_TEST_THREAD_H_
-
-#include "base/basictypes.h"
-#include "build/build_config.h"
-
-#if defined(OS_POSIX)
-#include <pthread.h>
-#elif defined(OS_WIN)
-#include <windows.h>
-#endif  // OS_POSIX
-
-namespace crashpad {
-namespace test {
-
-//! \brief Basic thread abstraction for testing. Users should derive from this
-//!     class and implement ThreadMain().
-class Thread {
- public:
-  Thread();
-  virtual ~Thread();
-
-  //! \brief Create a platform thread, and run ThreadMain() on that thread. Must
-  //!     be paired with a call to Join().
-  void Start();
-
-  //! \brief Block until ThreadMain() exits. This may be called from any thread.
-  //!     Must paired with a call to Start().
-  void Join();
-
- private:
-  //! \brief The entry point to be overridden to implement the test-specific
-  //!     functionality.
-  virtual void ThreadMain() = 0;
-
-  static
-#if defined(OS_POSIX)
-      void*
-#elif defined(OS_WIN)
-      DWORD WINAPI
-#endif  // OS_POSIX
-      ThreadEntryThunk(void* argument);
-
-#if defined(OS_POSIX)
-  pthread_t platform_thread_;
-#elif defined(OS_WIN)
-  HANDLE platform_thread_;
-#endif
-
-  DISALLOW_COPY_AND_ASSIGN(Thread);
-};
-
-}  // namespace test
-}  // namespace crashpad
-
-#endif  // CRASHPAD_TEST_THREAD_H_