Base: A few more files using BASE_API (for base.dll)

base/threading/non_thread_safe_impl.h

 // Copyright (c) 2011 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 BASE_THREADING_NON_THREAD_SAFE_IMPL_H_
 #define BASE_THREADING_NON_THREAD_SAFE_IMPL_H_
 #pragma once
 
+#include "base/base_api.h"
 #include "base/threading/thread_checker_impl.h"
 
 namespace base {
 
 // Full implementation of NonThreadSafe, for debug mode or for occasional
 // temporary use in release mode e.g. when you need to CHECK on a thread
 // bug that only occurs in the wild.
 //
 // Note: You should almost always use the NonThreadSafe class to get
 // the right version of the class for your build configuration.
-class NonThreadSafeImpl {
+class BASE_API NonThreadSafeImpl {
  public:
   ~NonThreadSafeImpl();
 
   bool CalledOnValidThread() const;
 
  protected:
   // Changes the thread that is checked for in CalledOnValidThread. The next
   // call to CalledOnValidThread will attach this class to a new thread. It is
   // up to the NonThreadSafe derived class to decide to expose this or not.
   // This may be useful when an object may be created on one thread and then
   // used exclusively on another thread.
   void DetachFromThread();
 
  private:
   ThreadCheckerImpl thread_checker_;
 };
 
 }  // namespace base
 
 #endif  // BASE_THREADING_NON_THREAD_SAFE_IMPL_H_