ShadowRootAware should not be defined in lib/core/annotation.dart

[BlackHC]

ShadowRootAware is a helper interface and not an annotation. Because it is defined in annotation.dart, it pulls dart:html import into annotation.dart as well, which makes it impossible to write non-drt tests for dart components, even though simple components might not require it otherwise.

Moreover, a recent PR #1401 undid PR #1313 that fixed a spurious export (ShadowRootAware from annotation_src.dart) that does not exist anymore.

[rkirov]

Created a PR to move all aware interfaces into their own library, because I agree that they are not annotations. This is roll-forward the clean-up #1313 that got accidentally rolled back.

However, you will still have the problem that as soon as one of your components needs an aware interface you will need a dart:html enabled VM (even if it is just ScopeAware). A full clean separation of angular internals into html-dependent and html-independent has benefits but might be too much work (definitely not a goal for v1.0.)

[BlackHC]

Thanks! No worries! :)