GitLab

Move storage cleaning logic from CastDemoService and ManagedModeService
to CastWebService in the upstream. Therefore those two classes no longer
need to depend on content/browser/browser_context and a few other
things.

Merge-With: eureka-internal/342450

Bug: b/144316586
Test: CQ
Change-Id: Id5908d78207003c22f306e739d5272cee774aa7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1956105Reviewed-by: Sean Topping <seantopping@chromium.org>
Commit-Queue: Zhaoxin Liang <zxliang@google.com>
Cr-Commit-Position: refs/heads/master@{#723576}