tree 61156d4f7585fad8a62318ae117fa5999964ef83
parent dcc2f22a40eb6070ba79b322f8db3a2a7cc1bb22
author Elliott Sprehn <esprehn@chromium.org> 1418764494 -0800
committer Elliott Sprehn <esprehn@chromium.org> 1418764494 -0800

Only the main document should have a StyleEngine.

In Sky <style> elements in import documents don't apply to the main document,
so we don't need the StyleEngine to be aware of the import tree. This change
makes us only create the StyleEngine for active documents.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/813493003