Bug 1557928 - Rename the DoNotCare tracer kind r=jonco

Depends on D34675

Differential Revision: https://phabricator.services.mozilla.com/D34703

--HG--
extra : moz-landing-system : lando

js/public/TracingAPI.h

@@ -239,14 +239,14 @@ class JS_PUBLIC_API CallbackTracer : public JSTracer {
 
 #ifdef DEBUG
   enum class TracerKind {
-    DoNotCare,
+    Unspecified,
     Moving,
     GrayBuffering,
     VerifyTraceProtoAndIface,
     ClearEdges,
     UnmarkGray
   };
-  virtual TracerKind getTracerKind() const { return TracerKind::DoNotCare; }
+  virtual TracerKind getTracerKind() const { return TracerKind::Unspecified; }
 #endif
 
   // In C++, overriding a method hides all methods in the base class with