Have Document::markers() return a reference

Source/core/editing/SplitTextNodeCommand.cpp

 /*
  * Copyright (C) 2005, 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 44 matching lines @@
     ContainerNode* parent = m_text2->parentNode();
     if (!parent || !parent->rendererIsEditable())
         return;
 
     String prefixText = m_text2->substringData(0, m_offset, IGNORE_EXCEPTION);
     if (prefixText.isEmpty())
         return;
 
     m_text1 = Text::create(document(), prefixText);
     ASSERT(m_text1);
-    document().markers()->copyMarkers(m_text2.get(), 0, m_offset, m_text1.get(), 0);
+    document().markers().copyMarkers(m_text2.get(), 0, m_offset, m_text1.get(), 0);
 
     insertText1AndTrimText2();
 }
 
 void SplitTextNodeCommand::doUnapply()
 {
     if (!m_text1 || !m_text1->rendererIsEditable())
         return;
 
     ASSERT(m_text1->document() == document());
 
     String prefixText = m_text1->data();
 
     m_text2->insertData(0, prefixText, ASSERT_NO_EXCEPTION, CharacterData::DeprecatedRecalcStyleImmediatlelyForEditing);
 
-    document().markers()->copyMarkers(m_text1.get(), 0, prefixText.length(), m_text2.get(), 0);
+    document().markers().copyMarkers(m_text1.get(), 0, prefixText.length(), m_text2.get(), 0);
     m_text1->remove(ASSERT_NO_EXCEPTION);
 }
 
 void SplitTextNodeCommand::doReapply()
 {
     if (!m_text1 || !m_text2)
         return;
 
     ContainerNode* parent = m_text2->parentNode();
     if (!parent || !parent->rendererIsEditable())
         return;
 
     insertText1AndTrimText2();
 }
 
 void SplitTextNodeCommand::insertText1AndTrimText2()
 {
     TrackExceptionState exceptionState;
     m_text2->parentNode()->insertBefore(m_text1.get(), m_text2.get(), exceptionState);
     if (exceptionState.hadException())
         return;
     m_text2->deleteData(0, m_offset, exceptionState, CharacterData::DeprecatedRecalcStyleImmediatlelyForEditing);
 }
 
 } // namespace WebCore