ChromeContentBrowserClient.

Updated override in BraveContentBrowserClient.

Chromium change:

https://chromium.googlesource.com/chromium/src/+/1be897a02157e874bcdf889192951537a9cf90b3

commit 1be897a02157e874bcdf889192951537a9cf90b3
Author: Dominic Farolino <dom@chromium.org>
Date:   Sat Jul 20 08:11:42 2019 +0000

    Convert old mojo types to new ones in //content loading code

    Specifically, this code updates URLLoaderFactoryBundleInfo, and
    subclasses to use the new mojo types. This CL also updates variables
    that reference this class in RenderFrameHostImpl, and follows the path
    down through ContentBrowserClient subclasses updating variables where
    necessary.

    The change is mostly mechanical, and as tightly-scoped as I could make
    it given the instances I aimed to update.

    Bug: 955171