GitLab

This CL converts KeepAlive mojom interface clients in extension to
use BrowserInterfaceBroker, and introduces
RegisterBrowserInterfaceBindersForFrame method in
ExtensionsBrowserClient class to register the extension interfaces
to a binder map for BrowserInterfaceBroker.

Bug: 936482
Change-Id: I6e793427ef32138454ae191c8623cabcee9a61f9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1946188
Commit-Queue: Miyoung Shin <myid.shin@igalia.com>
Reviewed-by: calamity <calamity@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Sean Topping <seantopping@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Oksana Zhuravlova <oksamyt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721868}