Bug 63606 depends on 5 open bugs:

•    63606: [Meta] Implement Shadow DOM [RESOLVED CONFIGURATION CHANGED; assigned to webkit-unassigned]
  •    72352: [meta] Shadow DOM stability, flakiness and other random bugs. [REOPENED; assigned to webkit-unassigned]
    •    59970: CSSCursorImageValue::cachedImage will fail with an SVG <cursor> element in a shadow DOM [NEW; assigned to webcomponents-bugzilla]
    •    82697: [meta] Editing and Selection in Shadow DOM [NEW; assigned to webkit-unassigned]
      •    80502: Editing caret should skip elements with shadow dom. [NEW; assigned to morrita]
      •    87463: Assertion failure due to Position::upstream() and downstream() not considering shadow hosts as an atomic node and thus crossing editing boundaries [NEW; assigned to webcomponents-bugzilla]

Bug 63606 does not block any open bugs.