Bug 1833879 - Add a UseCounter for DOMParser.parseFromString and Range.createContextualFragment;r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D178457

dom/base/UseCounters.conf

@@ -366,6 +366,10 @@ method Window.WritableStream
 // Gecko-specific command usage of `Document.execCommand`
 custom DocumentExecCommandContentReadOnly calls execCommand with contentReadOnly
 
+// Methods used in frameworks to create DOM from strings
+method DOMParser.parseFromString
+method Range.createContextualFragment
+
 // Gecko-specific command usage of `Document.queryCommandState` or `Document.queryCommandValue`
 custom DocumentQueryCommandStateOrValueContentReadOnly calls queryCommandState or queryCommandValue with contentReadOnly
 custom DocumentQueryCommandStateOrValueInsertBrOnReturn calls queryCommandState or queryCommandValue with insertBrOnReturn

dom/webidl/DOMParser.webidl

@@ -23,7 +23,7 @@ interface DOMParser {
   [Throws]
   constructor();
 
-  [NewObject, Throws]
+  [NewObject, Throws, UseCounter]
   Document parseFromString(DOMString str, SupportedType type);
 
   [NewObject, ChromeOnly, Throws]

dom/webidl/Range.webidl

@@ -75,7 +75,7 @@ interface Range : AbstractRange {
 
 // http://domparsing.spec.whatwg.org/#dom-range-createcontextualfragment
 partial interface Range {
-  [CEReactions, Throws]
+  [CEReactions, Throws, UseCounter]
   DocumentFragment createContextualFragment(DOMString fragment);
 };