Bug 1649121: part 18) Declare `CreateDOMFragmentFromPaste` `const`. r=masayuki

Differential Revision: https://phabricator.services.mozilla.com/D82198

editor/libeditor/HTMLEditor.h

@@ -4393,7 +4393,7 @@ class HTMLEditor final : public TextEditor,
       const nsAString& aInputString, const nsAString& aContextStr,
       const nsAString& aInfoStr, nsCOMPtr<nsINode>* aOutFragNode,
       nsCOMPtr<nsINode>* aOutStartNode, nsCOMPtr<nsINode>* aOutEndNode,
-      int32_t* aOutStartOffset, int32_t* aOutEndOffset, bool aTrustedInput);
+      int32_t* aOutStartOffset, int32_t* aOutEndOffset, bool aTrustedInput) const;
   static nsresult ParseFragment(const nsAString& aStr,
                                 nsAtom* aContextLocalName, Document* aTargetDoc,
                                 dom::DocumentFragment** aFragment,

editor/libeditor/HTMLEditorDataTransfer.cpp

@@ -2910,7 +2910,7 @@ nsresult HTMLEditor::CreateDOMFragmentFromPaste(
     const nsAString& aInputString, const nsAString& aContextStr,
     const nsAString& aInfoStr, nsCOMPtr<nsINode>* aOutFragNode,
     nsCOMPtr<nsINode>* aOutStartNode, nsCOMPtr<nsINode>* aOutEndNode,
-    int32_t* aOutStartOffset, int32_t* aOutEndOffset, bool aTrustedInput) {
+    int32_t* aOutStartOffset, int32_t* aOutEndOffset, bool aTrustedInput) const {
   if (NS_WARN_IF(!aOutFragNode) || NS_WARN_IF(!aOutStartNode) ||
       NS_WARN_IF(!aOutEndNode) || NS_WARN_IF(!aOutStartOffset) ||
       NS_WARN_IF(!aOutEndOffset)) {