Remove unneeded uses of base/ref_counted.h.

chrome/browser/bookmarks/bookmark_service.h

 // Copyright 2008, 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 14 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY 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 CHROME_BROWSER_BOOKMARKS_BOOKMARK_SERVICE_H_
 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_SERVICE_H_
 
 #include <vector>
 
-#include "base/ref_counted.h"
-
 class GURL;
 
 // BookmarkService provides a thread safe view of bookmarks. It is used by
 // HistoryBackend when it needs to determine the set of bookmarked URLs
 // or if a URL is bookmarked.
 //
 // BookmarkService is owned by Profile and deleted when the Profile is deleted.
 class BookmarkService {
  public:
   // Returns true if the specified URL is bookmarked.
   //
   // If not on the main thread you *must* invoke BlockTillLoaded first.
   virtual bool IsBookmarked(const GURL& url) = 0;
 
   // Returns, by reference in urls, the set of bookmarked urls. This returns
   // the unique set of URLs. For example, if two bookmarks reference the same
   // URL only one entry is added.
   //
   // If not on the main thread you *must* invoke BlockTillLoaded first.
   virtual void GetBookmarks(std::vector<GURL>* urls) = 0;
 
   // Blocks until loaded. This is intended for usage on a thread other than
   // the main thread.
   virtual void BlockTillLoaded() = 0;
 };
 
 #endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_SERVICE_H_