Bug 1636924 - Remove unnecessary isTopLevel and type properties from onTargetAvailable/onTargetDestroyed callback parameter. r=ochameau.

Since targetFronts now have isTopLevel and targetType properties, we can directly use
those, as the targetFront is included in the callback parameter.
This patch remove those properties and refactor consumer code.

Differential Revision: https://phabricator.services.mozilla.com/D74651

devtools/client/inspector/changes/ChangesView.js

@@ -126,26 +126,26 @@ class ChangesView {
     changesFront.off("clear-changes", this.onClearChanges);
   }
 
-  async onTargetAvailable({ type, targetFront, isTopLevel }) {
+  async onTargetAvailable({ targetFront }) {
     targetFront.watchFronts(
       "changes",
       this.onChangesFrontAvailable,
       this.onChangesFrontDestroyed
     );
 
-    if (isTopLevel) {
+    if (targetFront.isTopLevel) {
       targetFront.on("will-navigate", this.onClearChanges);
     }
   }
 
-  async onTargetDestroyed({ type, targetFront, isTopLevel }) {
+  async onTargetDestroyed({ targetFront }) {
     targetFront.unwatchFronts(
       "changes",
       this.onChangesFrontAvailable,
       this.onChangesFrontDestroyed
     );
 
-    if (isTopLevel) {
+    if (targetFront.isTopLevel) {
       targetFront.off("will-navigate", this.onClearChanges);
     }
   }