- implement the new "inspected-window" command
- move WebExtensionInspectedWindowFront implement to the command, making the front empty
- migrate tests to use the commands instead of front
- stop maintaining the current top level target in ExtensionParent.jsm, no longer have to use watchTargets
- stop creating a new descriptor on each new target
- instead only pull one new dedicated "commands" for WebExt (still in ExtensionParent.jsm)
- remove TabDescriptor isDevToolsExtensionContext as we no longer need anything special in the descriptor
- remove now unused methods on DevToolsShims (createWebExtensionInspectedWindowFront, createDescriptorForTabForWebExtension)
- remove the now unused TabDescriptorFactory.createDescriptorForTab's "forceCreationForWebextension" option, as CommandsFactory.forTab always instantiate a brand new commands
- migrate webext to use the command instead of front
Differential Revision: https://phabricator.services.mozilla.com/D108994
d9628fcd91
