Add CWVWebView.visibleLocationString.

This is more human friendly version of CWVWebView.visibleURL.

Bug: 789002
Change-Id: I9e70fb17afe96eda4e7d702a704ee58c1bbca420
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1687548
Reviewed-by: Tommy Li <tommycli@chromium.org>
Reviewed-by: John Wu <jzw@chromium.org>
Commit-Queue: Hiroshi Ichikawa <ichikawa@chromium.org>
Auto-Submit: Hiroshi Ichikawa <ichikawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#677627}
7 files changed