Call style directly in InspectorCSSAgent::asInspectorStyleSheet
Call style directly in InspectorCSSAgent::asInspectorStyleSheet

We can just call style() directly here, internally it does the same check.

Review URL: https://codereview.chromium.org/442473002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@179516 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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