Replace use of std containers with WTF's equivalents in service_worker/*

This CL replaces the use of std::vector of std containers and
std::string with WTF::Vector and WTF::String in service_worker/*.

Bug: 952716
Change-Id: I2d534a2b752f44e985105e8806db2a01f2faea8f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1687353
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Miyoung Shin <myid.shin@igalia.com>
Cr-Commit-Position: refs/heads/master@{#674672}
4 files changed