Previously, new `Recorder` instance was given an existing
`InjectedScript`. However, we built a separate source for
`InjectedScript` vs `Recorder`, and both bundles contain their own copy
of all helper modules, e.g. `roleUtils`.
This resulted in two copies of helper modules, which is troublesome for
any module-level globals like a top-level cache. Depending on whether
`Recorder` or `InjectedScript` called into the helper, they would access
the different value of a module global, which lead to bugs.
To prevent this, we force any external dependencies to be imported
through the `InjectedScript.utils`.
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