Bug 1640276 - Part 7: Mark nsINode as const in IsVisibleBRElement() r=masayuki

Differential Revision: https://phabricator.services.mozilla.com/D76570

editor/libeditor/HTMLEditor.cpp

@@ -858,7 +858,7 @@ void HTMLEditor::IsPrevCharInNodeWhitespace(nsIContent* aContent,
   }
 }
 
-bool HTMLEditor::IsVisibleBRElement(nsINode* aNode) {
+bool HTMLEditor::IsVisibleBRElement(const nsINode* aNode) {
   MOZ_ASSERT(aNode);
   if (!aNode->IsHTMLElement(nsGkAtoms::br)) {
     return false;

editor/libeditor/HTMLEditor.h

@@ -928,7 +928,7 @@ class HTMLEditor final : public TextEditor,
   /**
    * Small utility routine to test if a break node is visible to user.
    */
-  bool IsVisibleBRElement(nsINode* aNode);
+  bool IsVisibleBRElement(const nsINode* aNode);
 
   /**
    * Helper routines for font size changing.