Extract webkit_unit_tests from blink_web component.

third_party/WebKit/public/web/WebElement.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 62 matching lines @@
     // Returns the bounds of the element in Visual Viewport. The bounds
     // have been adjusted to include any transformations, including page scale.
     // This function will update the layout if required.
     BLINK_EXPORT WebRect boundsInViewport() const;
 
     // Returns the image contents of this element or a null WebImage
     // if there isn't any.
     BLINK_EXPORT WebImage imageContents();
 
 #if BLINK_IMPLEMENTATION
-    WebElement(const PassRefPtrWillBeRawPtr<Element>&);
-    WebElement& operator=(const PassRefPtrWillBeRawPtr<Element>&);
-    operator PassRefPtrWillBeRawPtr<Element>() const;
+    BLINK_EXPORT WebElement(const PassRefPtrWillBeRawPtr<Element>&);
+    BLINK_EXPORT WebElement& operator=(const PassRefPtrWillBeRawPtr<Element>&);
+    BLINK_EXPORT operator PassRefPtrWillBeRawPtr<Element>() const;
 #endif
 };
 
 DECLARE_WEB_NODE_TYPE_CASTS(WebElement);
 
 } // namespace blink
 
 #endif