[Variables] Enable get/setProperty and similar APIs from the CSSOM

third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 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:
  * 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
@@ skipping 552 matching lines @@
             }
             // There are other styles that style rules can give to style spans,
             // but these are the two important ones because they'll prevent
             // inserted content from appearing in the right paragraph.
             // FIXME: Hyatt is concerned that selectively using display:inline will give inconsistent
             // results. We already know one issue because td elements ignore their display property
             // in quirks mode (which Mail.app is always in). We should look for an alternative.
 
             // Mutate using the CSSOM wrapper so we get the same event behavior as a script.
             if (isEnclosingBlock(element))
-                element->style()->setPropertyInternal(CSSPropertyDisplay, "inline", false, IGNORE_EXCEPTION);
+                element->style()->setPropertyInternal(CSSPropertyDisplay, String(), "inline", false, IGNORE_EXCEPTION);
             if (element->layoutObject() && element->layoutObject()->style()->isFloating())
-                element->style()->setPropertyInternal(CSSPropertyFloat, "none", false, IGNORE_EXCEPTION);
+                element->style()->setPropertyInternal(CSSPropertyFloat, String(), "none", false, IGNORE_EXCEPTION);
         }
     }
 }
 
 static bool isProhibitedParagraphChild(const AtomicString& name)
 {
     // https://dvcs.w3.org/hg/editing/raw-file/57abe6d3cb60/editing.html#prohibited-paragraph-child
     DEFINE_STATIC_LOCAL(HashSet<AtomicString>, elements, ());
     if (elements.isEmpty()) {
         elements.add(addressTag.localName());
@@ skipping 957 matching lines @@
 DEFINE_TRACE(ReplaceSelectionCommand)
 {
     visitor->trace(m_startOfInsertedContent);
     visitor->trace(m_endOfInsertedContent);
     visitor->trace(m_insertionStyle);
     visitor->trace(m_documentFragment);
     CompositeEditCommand::trace(visitor);
 }
 
 } // namespace blink