GitLab

This change introduces a client interface for Media Router
which separates the embedder specific actions from shared
behavior, MediaRouterClient. The term "client" is used over
"delegate" because it's a singleton.

Additionally, symbol names that use "Chrome" are updated to
use "Browser" instead.

After this change, all of [...]chrome.browser.media.router
(save the new client, ChromeMediaRouterClient, which is
Chrome specific) can be moved to [...]components.media_router.

Bug: 1057100

Change-Id: I94b538b4fdb5868eda2149847b5e23c048f3cd28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2373293Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Reviewed-by: Zhiqiang Zhang <zqzhang@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804074}