Fix build bustage caused by wrong include case.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@45481 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/WebCore/platform/ScrollbarClient.h b/WebCore/platform/ScrollbarClient.h
index 3b44216..6efe72e 100644
--- a/WebCore/platform/ScrollbarClient.h
+++ b/WebCore/platform/ScrollbarClient.h
@@ -27,7 +27,7 @@
 #define ScrollbarClient_h
 
 #include "IntRect.h"
-#include "ScrollBar.h"
+#include "Scrollbar.h"
 #include <wtf/Vector.h>
 
 namespace WebCore {