Use tighter typing in editing: PlainTextRange / ReplaceNodeWithSpanCommand

Source/core/editing/PlainTextRange.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov.
  *
  * 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 141 matching lines @@
     if (!startRangeFound)
         return nullptr;
 
     if (length() && end() > docTextPosition) { // end() is out of bounds
         resultRange->setEnd(textRunRange->endContainer(), textRunRange->endOffset(), IGNORE_EXCEPTION);
     }
 
     return resultRange.release();
 }
 
-PlainTextRange PlainTextRange::create(const Node& scope, const Range& range)
+PlainTextRange PlainTextRange::create(const ContainerNode& scope, const Range& range)
 {
     if (!range.startContainer())
         return PlainTextRange();
 
     // The critical assumption is that this only gets called with ranges that
     // concentrate on a given area containing the selection root. This is done
     // because of text fields and textareas. The DOM for those is not
     // directly in the document DOM, so ensure that the range does not cross a
     // boundary of one of those.
     if (range.startContainer() != &scope && !range.startContainer()->isDescendantOf(&scope))
         return PlainTextRange();
     if (range.endContainer() != scope && !range.endContainer()->isDescendantOf(&scope))
         return PlainTextRange();
 
-    RefPtrWillBeRawPtr<Range> testRange = Range::create(scope.document(), const_cast<Node*>(&scope), 0, range.startContainer(), range.startOffset());
+    RefPtrWillBeRawPtr<Range> testRange = Range::create(scope.document(), const_cast<ContainerNode*>(&scope), 0, range.startContainer(), range.startOffset());
     ASSERT(testRange->startContainer() == &scope);
     size_t start = TextIterator::rangeLength(testRange.get());
 
     testRange->setEnd(range.endContainer(), range.endOffset(), IGNORE_EXCEPTION);
     ASSERT(testRange->startContainer() == &scope);
     size_t end = TextIterator::rangeLength(testRange.get());
 
     return PlainTextRange(start, end);
 }
 
 }