Support dynamic import from classic scripts by creating ClassicScript objects and associating them with the compiled.
https://bugzilla.mozilla.org/show_bug.cgi?id=1342012
This patch is incomplete, some code in ScriptLoader::EvaluateScript() could not be applied for missing dependencies.
Part 7e will apply the missing dependencies and finish the patch.
(cherry picked from commit ce31a906e801b72f06385b0755710317ccf3658b)
Since these are just interpreted comments, there's 0 impact on actual code.
This removes all lines that match /* vim: set(.*)tw=80: */ with S&R -- there are
a few others scattered around which will be removed manually in a second part.
This splits ScriptLoader up the same way Mozilla did with the exception of
ScriptRequest due to the fact that ScriptLoader and ScriptRequest are
interdependent and would create a circular dependency if split apart when not
using unified building.