Re-land "Rename CFWL_Thread classes to ThreadImp"

xfa/include/fwl/adapter/fwl_adapterthreadmgr.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef _FWL_ADAPTER_THREAD_H
-#define _FWL_ADAPTER_THREAD_H
+#ifndef FWL_ADAPTERTHREADMGR_H_
+#define FWL_ADAPTERTHREADMGR_H_
+
 class IFWL_Thread;
-class IFWL_AdapterMutex;
-class IFWL_AdapterSemaphore;
 
 class IFWL_AdapterThreadMgr {
  public:
   virtual ~IFWL_AdapterThreadMgr() {}
   virtual FWL_ERR Start(IFWL_Thread* pThread,
                         FWL_HTHREAD& hThread,
                         FX_BOOL bSuspended = FALSE) = 0;
   virtual FWL_ERR Resume(FWL_HTHREAD hThread) = 0;
   virtual FWL_ERR Suspend(FWL_HTHREAD hThread) = 0;
   virtual FWL_ERR Kill(FWL_HTHREAD hThread, int32_t iExitCode) = 0;
   virtual FWL_ERR Stop(FWL_HTHREAD hThread, int32_t iExitCode) = 0;
   virtual IFWL_Thread* GetCurrentThread() = 0;
 };
-class IFWL_AdapterSemaphore {
- public:
-  virtual ~IFWL_AdapterSemaphore() {}
-  static IFWL_AdapterSemaphore* Create();
-  virtual FWL_ERR Destroy() = 0;
-  virtual FWL_ERR Wait() const = 0;
-  virtual FWL_ERR Post() = 0;
-  virtual FWL_ERR Value(FX_DWORD& val) const = 0;
-  virtual FWL_ERR Reset(int32_t init) = 0;
-};
-#endif
+#endif  // FWL_ADAPTERTHREADMGR_H_