Make DedicatedWorkerHost inherit BackForwardCacheHostControllerHost

This is a preparation to notify feature usages and/or evict the frame
from dedicated workers.

This CL also passes a BackForwardCacheHostControllerHost to a renderer,
but the renderer doesn't call any functions of the host yet. I will
update this in later CLs.

Design Doc: https://docs.google.com/document/d/1CJfDNqA2tEp_dmxK5kaBHHqGjx7cK2_jhTpsCwSCa3A/edit?usp=sharing

Bug: 1146955
Change-Id: Ieea9c9013e52b7e0ffb8d9b4386903dd32fe82bb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3220891
Auto-Submit: Hajime Hoshi <hajimehoshi@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Commit-Queue: Hajime Hoshi <hajimehoshi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#934878}

• content/browser/worker_host/dedicated_worker_host.cc[diff]
• content/browser/worker_host/dedicated_worker_host.h[diff]
• content/browser/worker_host/dedicated_worker_service_impl_unittest.cc[diff]
• content/renderer/worker/dedicated_worker_host_factory_client.cc[diff]
• content/renderer/worker/dedicated_worker_host_factory_client.h[diff]
• third_party/blink/public/mojom/worker/dedicated_worker_host_factory.mojom[diff]
• third_party/blink/public/platform/web_dedicated_worker.h[diff]
• third_party/blink/renderer/core/workers/dedicated_worker.cc[diff]
• third_party/blink/renderer/core/workers/dedicated_worker.h[diff]
• third_party/blink/renderer/core/workers/dedicated_worker_global_scope.cc[diff]
• third_party/blink/renderer/core/workers/dedicated_worker_global_scope.h[diff]
• third_party/blink/renderer/core/workers/dedicated_worker_messaging_proxy.cc[diff]
• third_party/blink/renderer/core/workers/dedicated_worker_messaging_proxy.h[diff]
• third_party/blink/renderer/core/workers/dedicated_worker_test.cc[diff]
• third_party/blink/renderer/core/workers/dedicated_worker_thread.cc[diff]
• third_party/blink/renderer/core/workers/dedicated_worker_thread.h[diff]