Use ContainerNode more in DOMEditor

Source/core/inspector/DOMEditor.h

Index: Source/core/inspector/DOMEditor.h
diff --git a/Source/core/inspector/DOMEditor.h b/Source/core/inspector/DOMEditor.h
index 4e4194daf1781589941eae38756ccd2921047c2e..60e52b273ca71b77188f2ae5fc0ac004e85092ac 100644
--- a/Source/core/inspector/DOMEditor.h
+++ b/Source/core/inspector/DOMEditor.h
@@ -36,6 +36,7 @@
 
 namespace blink {
 
+class ContainerNode;
 class Element;
 class ExceptionState;
 class InspectorHistory;
@@ -52,17 +53,17 @@ public:
 
     void trace(Visitor*);
 
-    bool insertBefore(Node* parentNode, PassRefPtrWillBeRawPtr<Node>, Node* anchorNode, ExceptionState&);
-    bool removeChild(Node* parentNode, Node*, ExceptionState&);
+    bool insertBefore(ContainerNode* parentNode, PassRefPtrWillBeRawPtr<Node>, Node* anchorNode, ExceptionState&);
+    bool removeChild(ContainerNode* parentNode, Node*, ExceptionState&);
     bool setAttribute(Element*, const String& name, const String& value, ExceptionState&);
     bool removeAttribute(Element*, const String& name, ExceptionState&);
     bool setOuterHTML(Node*, const String& html, Node** newNode, ExceptionState&);
     bool replaceWholeText(Text*, const String& text, ExceptionState&);
-    bool replaceChild(Node* parentNode, PassRefPtrWillBeRawPtr<Node> newNode, Node* oldNode, ExceptionState&);
+    bool replaceChild(ContainerNode* parentNode, PassRefPtrWillBeRawPtr<Node> newNode, Node* oldNode, ExceptionState&);
     bool setNodeValue(Node* parentNode, const String& value, ExceptionState&);
 
-    bool insertBefore(Node* parentNode, PassRefPtrWillBeRawPtr<Node>, Node* anchorNode, ErrorString*);
-    bool removeChild(Node* parentNode, Node*, ErrorString*);
+    bool insertBefore(ContainerNode* parentNode, PassRefPtrWillBeRawPtr<Node>, Node* anchorNode, ErrorString*);
+    bool removeChild(ContainerNode* parentNode, Node*, ErrorString*);
     bool setAttribute(Element*, const String& name, const String& value, ErrorString*);
     bool removeAttribute(Element*, const String& name, ErrorString*);
     bool setOuterHTML(Node*, const String& html, Node** newNode, ErrorString*);