Bug 1484092 - part 2: Drop supporting "namedanchor" special element n…

…ame from nsIHTMLEditor::GetSelectedElement(), nsIHTMLEditor::GetElementOrParentByTagName() and nsIHTMLEditor::CreateElementWithDefaults() r=m_kato

Nobody (including comm-central and BlueGriffon) does not use "namedanchor"
special element name with those XPCOMs.  Of course, our internal callers too.
Therefore, we can drop.

Note that there is no static Atom for this, so, keeping it makes unnecessary
runtime cost for Firefox users.

This could cause breaking some legacy add-ons for Thunderbird.  However,
they can use "anchor" special element name for same purpose.

Differential Revision: https://phabricator.services.mozilla.com/D3585

editor/libeditor/HTMLEditor.cpp

@@ -97,8 +97,7 @@ IsLinkTag(const nsAtom& aTagName)
 static bool
 IsNamedAnchorTag(const nsAtom& aTagName)
 {
-  return aTagName.Equals(NS_LITERAL_STRING("anchor")) ||
-         aTagName.Equals(NS_LITERAL_STRING("namedanchor"));
+  return aTagName.Equals(NS_LITERAL_STRING("anchor");
 }
 
 template EditorDOMPoint

editor/libeditor/HTMLEditor.h

@@ -333,9 +333,8 @@ class HTMLEditor final : public TextEditor
    *                        If nsGkAtoms::td, the result may be <td> or <th>.
    *                        If nsGkAtoms::href, the result may be <a> element
    *                        which has "href" attribute with non-empty value.
-   *                        If nsGkAtoms::anchor or atom of "namedanchor", the
-   *                        result may be <a> which has "name" attribute with
-   *                        non-empty value.
+   *                        If nsGkAtoms::anchor, the result may be <a> which
+   *                        has "name" attribute with non-empty value.
    * @param aNode           If non-nullptr, this starts to look for the result
    *                        from it.  Otherwise, i.e., nullptr, starts from
    *                        anchor node of Selection.
@@ -846,9 +845,8 @@ class HTMLEditor final : public TextEditor
    *                        If nsGkAtoms::td, the result may be <td> or <th>.
    *                        If nsGkAtoms::href, the result may be <a> element
    *                        which has "href" attribute with non-empty value.
-   *                        If nsGkAtoms::anchor or atom of "namedanchor", the
-   *                        result may be <a> which has "name" attribute with
-   *                        non-empty value.
+   *                        If nsGkAtoms::anchor, the result may be <a> which
+   *                        has "name" attribute with non-empty value.
    * @return                If an element which matches aTagName, returns
    *                        an Element.  Otherwise, nullptr.
    */
@@ -867,9 +865,8 @@ class HTMLEditor final : public TextEditor
    *                        If nsGkAtoms::td, the result may be <td> or <th>.
    *                        If nsGkAtoms::href, the result may be <a> element
    *                        which has "href" attribute with non-empty value.
-   *                        If nsGkAtoms::anchor or atom of "namedanchor", the
-   *                        result may be <a> which has "name" attribute with
-   *                        non-empty value.
+   *                        If nsGkAtoms::anchor, the result may be <a> which
+   *                        has "name" attribute with non-empty value.
    * @param aNode           Start node to look for the element.
    * @return                If an element which matches aTagName, returns
    *                        an Element.  Otherwise, nullptr.

editor/nsIHTMLEditor.idl

@@ -312,8 +312,8 @@ interface nsIHTMLEditor : nsISupports
    *                        If "td", the result may be <td> or <th>.
    *                        If "href", the result may be <a> element
    *                        which has "href" attribute with non-empty value.
-   *                        If "anchor" or "namedanchor", the result may be <a>
-   *                        which has "name" attribute with non-empty value.
+   *                        If "anchor", the result may be <a> which has
+   *                        "name" attribute with non-empty value.
    * @param aNode           If non-null, this starts to look for the result
    *                        from it.  Otherwise, i.e., null, starts from
    *                        anchor node of Selection.