Remove unnecessary .get() in DOMEditor::ReplaceChildNodeAction.

Source/core/inspector/DOMEditor.cpp

Index: Source/core/inspector/DOMEditor.cpp
diff --git a/Source/core/inspector/DOMEditor.cpp b/Source/core/inspector/DOMEditor.cpp
index 6e986223e355ed4199ee5af82bd87acec47ea655..5c6d5ae45aba959701985691a37350feb9ec76d1 100644
--- a/Source/core/inspector/DOMEditor.cpp
+++ b/Source/core/inspector/DOMEditor.cpp
@@ -350,17 +350,13 @@ public:
 
     virtual bool undo(ExceptionState& exceptionState) OVERRIDE
     {
-        // FIXME: Oilpan: The first .get() is unnecessary if m_oldNode is a
-        // Persistent or a Member.
-        m_parentNode->replaceChild(m_oldNode.get(), m_newNode.get(), exceptionState);
+        m_parentNode->replaceChild(m_oldNode, m_newNode.get(), exceptionState);
         return !exceptionState.hadException();
     }
 
     virtual bool redo(ExceptionState& exceptionState) OVERRIDE
     {
-        // FIXME: Oilpan: The first .get() is unnecessary if m_newNode is a
-        // Persistent or a Member.
-        m_parentNode->replaceChild(m_newNode.get(), m_oldNode.get(), exceptionState);
+        m_parentNode->replaceChild(m_newNode, m_oldNode.get(), exceptionState);
         return !exceptionState.hadException();
     }