Build WTF as dll in component build

Source/wtf/ArrayBufferContents.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 11 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ArrayBufferContents_h
 #define ArrayBufferContents_h
 
 #include "wtf/ArrayBufferDeallocationObserver.h"
 #include "wtf/Noncopyable.h"
+#include "wtf/WTFExport.h"
 
 namespace WTF {
 
-class ArrayBufferContents {
+class WTF_EXPORT ArrayBufferContents {
     WTF_MAKE_NONCOPYABLE(ArrayBufferContents);
 public:
     enum InitializationPolicy {
         ZeroInitialize,
         DontInitialize
     };
 
     ArrayBufferContents();
     ArrayBufferContents(unsigned numElements, unsigned elementByteSize, ArrayBufferContents::InitializationPolicy);
 
@@ skipping 11 matching lines @@
 
 private:
     void* m_data;
     unsigned m_sizeInBytes;
     ArrayBufferDeallocationObserver* m_deallocationObserver;
 };
 
 } // namespace WTF
 
 #endif // ArrayBufferContents_h