merge_pr_8073
WPT Tests for ServiceWorker interception on dynamic import will be added in a following CL. Bug: 773778 Change-Id: I636b39f3e377adb36a664bac9cf2f50516a90ca0 Reviewed-on: https://chromium-review.googlesource.com/754422 Commit-Queue: Hiroki Nakagawa <[email protected]> Reviewed-by: Kinuko Yasuda <[email protected]> Cr-Commit-Position: refs/heads/master@{#514332}