Bug 1638928 Part 2 - Rename nsIFrame's GetChildLists() to ChildLists(). r=mats

This patch is generated by using my editor's rename functionality.

In the next patch, `nsIFrame::` prefix is going to be removed manually
from all the ChildLists() calls.

Differential Revision: https://phabricator.services.mozilla.com/D75893

layout/generic/nsBlockFrame.cpp

@@ -526,7 +526,7 @@ void nsBlockFrame::List(FILE* out, const char* aPrefix,
   // skip the principal list - we printed the lines above
   // skip the overflow list - we printed the overflow lines above
   ChildListIDs skip = {kPrincipalList, kOverflowList};
-  for (const auto& [list, listID] : nsIFrame::GetChildLists()) {
+  for (const auto& [list, listID] : nsIFrame::ChildLists()) {
     if (skip.contains(listID)) {
       continue;
     }