Cast highestEnclosingNodeOfType() return value to tighter type

Source/core/editing/DeleteSelectionCommand.cpp

 /*
  * Copyright (C) 2005 Apple Computer, 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 273 matching lines @@
 
     if (shouldNotInheritStyleFrom(*m_selectionToDelete.start().anchorNode()))
         return;
 
     // Figure out the typing style in effect before the delete is done.
     m_typingStyle = EditingStyle::create(m_selectionToDelete.start(), EditingStyle::EditingPropertiesInEffect);
     m_typingStyle->removeStyleAddedByNode(enclosingAnchorElement(m_selectionToDelete.start()));
 
     // If we're deleting into a Mail blockquote, save the style at end() instead of start()
     // We'll use this later in computeTypingStyleAfterDelete if we end up outside of a Mail blockquote
-    if (enclosingNodeOfType(m_selectionToDelete.start(), isMailBlockquote))
+    if (enclosingNodeOfType(m_selectionToDelete.start(), isMailHTMLBlockquoteElement))
         m_deleteIntoBlockquoteStyle = EditingStyle::create(m_selectionToDelete.end());
     else
         m_deleteIntoBlockquoteStyle = nullptr;
 }
 
 bool DeleteSelectionCommand::handleSpecialCaseBRDelete()
 {
     Node* nodeAfterUpstreamStart = m_upstreamStart.computeNodeAfterPosition();
     Node* nodeAfterDownstreamStart = m_downstreamStart.computeNodeAfterPosition();
     // Upstream end will appear before BR due to canonicalization
@@ skipping 419 matching lines @@
         return;
     }
 
     // Compute the difference between the style before the delete and the style now
     // after the delete has been done. Set this style on the frame, so other editing
     // commands being composed with this one will work, and also cache it on the command,
     // so the LocalFrame::appliedEditing can set it after the whole composite command
     // has completed.
 
     // If we deleted into a blockquote, but are now no longer in a blockquote, use the alternate typing style
-    if (m_deleteIntoBlockquoteStyle && !enclosingNodeOfType(m_endingPosition, isMailBlockquote, CanCrossEditingBoundary))
+    if (m_deleteIntoBlockquoteStyle && !enclosingNodeOfType(m_endingPosition, isMailHTMLBlockquoteElement, CanCrossEditingBoundary))
         m_typingStyle = m_deleteIntoBlockquoteStyle;
     m_deleteIntoBlockquoteStyle = nullptr;
 
     m_typingStyle->prepareToApplyAt(m_endingPosition);
     if (m_typingStyle->isEmpty())
         m_typingStyle = nullptr;
     // This is where we've deleted all traces of a style but not a whole paragraph (that's handled above).
     // In this case if we start typing, the new characters should have the same style as the just deleted ones,
     // but, if we change the selection, come back and start typing that style should be lost.  Also see
     // preserveTypingStyle() below.
@@ skipping 144 matching lines @@
     visitor->trace(m_deleteIntoBlockquoteStyle);
     visitor->trace(m_startRoot);
     visitor->trace(m_endRoot);
     visitor->trace(m_startTableRow);
     visitor->trace(m_endTableRow);
     visitor->trace(m_temporaryPlaceholder);
     CompositeEditCommand::trace(visitor);
 }
 
 } // namespace blink