Use tighter typing in editing: PlainTextRange / ReplaceNodeWithSpanCommand

Source/core/editing/CompositeEditCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2007, 2008 Apple 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 401 matching lines @@
 }
 
 void CompositeEditCommand::updatePositionForNodeRemovalPreservingChildren(Position& position, Node& node)
 {
     int offset = (position.anchorType() == Position::PositionIsOffsetInAnchor) ? position.offsetInContainerNode() : 0;
     updatePositionForNodeRemoval(position, node);
     if (offset)
         position.moveToOffset(offset);
 }
 
-HTMLElement* CompositeEditCommand::replaceElementWithSpanPreservingChildrenAndAttributes(PassRefPtrWillBeRawPtr<HTMLElement> node)
+HTMLSpanElement* CompositeEditCommand::replaceElementWithSpanPreservingChildrenAndAttributes(PassRefPtrWillBeRawPtr<HTMLElement> node)
 {
     // It would also be possible to implement all of ReplaceNodeWithSpanCommand
     // as a series of existing smaller edit commands.  Someone who wanted to
     // reduce the number of edit commands could do so here.
     RefPtrWillBeRawPtr<ReplaceNodeWithSpanCommand> command = ReplaceNodeWithSpanCommand::create(node);
     applyCommandToComposite(command);
     // Returning a raw pointer here is OK because the command is retained by
     // applyCommandToComposite (thus retaining the span), and the span is also
     // in the DOM tree, and thus alive whie it has a parent.
     ASSERT(command->spanElement()->inDocument());
@@ skipping 1066 matching lines @@
 }
 
 void CompositeEditCommand::trace(Visitor* visitor)
 {
     visitor->trace(m_commands);
     visitor->trace(m_composition);
     EditCommand::trace(visitor);
 }
 
 } // namespace blink