Change a bool type to an enum type in constructor argument of SpaceSplitString.

Source/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * 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.
@@ skipping 1662 matching lines @@
         bool matched = false;
         AtomicString dropZoneStr = element->fastGetAttribute(webkitdropzoneAttr);
 
         if (dropZoneStr.isEmpty())
             continue;
 
         UseCounter::count(element->document(), UseCounter::PrefixedHTMLElementDropzone);
 
         dropZoneStr = dropZoneStr.lower();
 
-        SpaceSplitString keywords(dropZoneStr, false);
+        SpaceSplitString keywords(dropZoneStr, ShouldNotFoldCase);
         if (keywords.isNull())
             continue;
 
         DragOperation dragOperation = DragOperationNone;
         for (unsigned i = 0; i < keywords.size(); i++) {
             DragOperation op = convertDropZoneOperationToDragOperation(keywords[i]);
             if (op != DragOperationNone) {
                 if (dragOperation == DragOperationNone)
                     dragOperation = op;
             } else {
@@ skipping 2250 matching lines @@
 
     // If it's in the direction to hide the top controls, only consume when the frame can also scroll.
     if (m_frame->view()->scrollPosition().y() < m_frame->view()->maximumScrollPosition().y())
         return true;
 
     return false;
 }
 
 
 } // namespace blink