Use VisibleSelection::InDOMTree::equalSelections() instead of operator==()

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 238 matching lines @@
     if (command->isSimpleEditCommand()) {
         command->setParent(0);
         ensureComposition()->append(toSimpleEditCommand(command.get()));
     }
     m_commands.append(command.release());
 }
 
 void CompositeEditCommand::applyCommandToComposite(PassRefPtrWillBeRawPtr<CompositeEditCommand> command, const VisibleSelection& selection)
 {
     command->setParent(this);
-    if (selection != command->endingSelection()) {
+    if (!VisibleSelection::InDOMTree::equalSelections(selection, command->endingSelection())) {
         command->setStartingSelection(selection);
         command->setEndingSelection(selection);
     }
     command->doApply();
     m_commands.append(command);
 }
 
 void CompositeEditCommand::applyStyle(const EditingStyle* style, EditAction editingAction)
 {
     applyCommandToComposite(ApplyStyleCommand::create(document(), style, editingAction));
@@ skipping 1228 matching lines @@
 }
 
 DEFINE_TRACE(CompositeEditCommand)
 {
     visitor->trace(m_commands);
     visitor->trace(m_composition);
     EditCommand::trace(visitor);
 }
 
 } // namespace blink