Move ThreadWrapper to ProcessThread in base.

webrtc/system_wrappers/source/thread.cc

-/*
- *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/system_wrappers/include/thread_wrapper.h"
-
-#if defined(_WIN32)
-#include "webrtc/system_wrappers/source/thread_win.h"
-#else
-#include "webrtc/system_wrappers/source/thread_posix.h"
-#endif
-
-namespace webrtc {
-
-#if defined(_WIN32)
-typedef ThreadWindows ThreadType;
-#else
-typedef ThreadPosix ThreadType;
-#endif
-
-rtc::scoped_ptr<ThreadWrapper> ThreadWrapper::CreateThread(
-    ThreadRunFunction func, void* obj, const char* thread_name) {
-  return rtc::scoped_ptr<ThreadWrapper>(
-      new ThreadType(func, obj, thread_name)).Pass();
-}
-
-}  // namespace webrtc