Tests that the extraResourceInfo in Network.loadingFinished contains a sourceMapURL for a Stylesheet containing a sourceMappingURL. Also then tests that Page.getResourceTree contains the sourceMapURL for the resource.

Response received for style.css
Network.loadingFailed extraResourceInfo contains a sourceMapURL: source-map-test-style.css.map
Page.getResourceTree resourcePayload contains sourceMapURL: source-map-test-style.css.map
SUCCESS