Use enum instead of "bool preserveSelection and bool preserveStyle" of moveParagraph()

third_party/WebKit/Source/core/editing/commands/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 689 matching lines @@
     // See https://bugs.webkit.org/show_bug.cgi?id=25439
     if (isRenderedAsNonInlineTableImageOrHR(startOfParagraphToMove.deepEquivalent().anchorNode()) && !isStartOfParagraph(mergeDestination)) {
         m_endingPosition = m_upstreamStart;
         return;
     }
 
     // moveParagraphs will insert placeholders if it removes blocks that would require their use, don't let block
     // removals that it does cause the insertion of *another* placeholder.
     bool needPlaceholder = m_needPlaceholder;
     bool paragraphToMergeIsEmpty = startOfParagraphToMove.deepEquivalent() == endOfParagraphToMove.deepEquivalent();
-    moveParagraph(startOfParagraphToMove, endOfParagraphToMove, mergeDestination, editingState, false, !paragraphToMergeIsEmpty);
+    moveParagraph(startOfParagraphToMove, endOfParagraphToMove, mergeDestination, editingState, DoNotPreserveSelection, paragraphToMergeIsEmpty ? DoNotPreserveStyle : PreserveStyle);
     if (editingState->isAborted())
         return;
     m_needPlaceholder = needPlaceholder;
     // The endingPosition was likely clobbered by the move, so recompute it (moveParagraph selects the moved paragraph).
     m_endingPosition = endingSelection().start();
 }
 
 void DeleteSelectionCommand::removePreviouslySelectedEmptyTableRows(EditingState* editingState)
 {
     if (m_endTableRow && m_endTableRow->inShadowIncludingDocument() && m_endTableRow != m_startTableRow) {
@@ skipping 240 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