Use range-based for and auto for m_scopedStyleResolvers in StyleEngine
Use range-based for and auto for m_scopedStyleResolvers in StyleEngine

TEST=compile, pass all layout tests

Review URL: https://codereview.chromium.org/723523004

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@185642 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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