Adapt to change in content_settings.mojom.AllowStorageAccess signature

The |site_for_cookies| parameter is now a net::SiteForCookies, instead
of a GURL.

Chromium change:

https://source.chromium.org/chromium/chromium/src/+/b7a6e74b0f7070dbc595b84bfbbf40b71f2f1db8

commit b7a6e74b0f7070dbc595b84bfbbf40b71f2f1db8
Author: Ari Chivukula <arichiv@chromium.org>
Date:   Fri Aug 6 20:43:41 2021 +0000

    [GURL -> SiteForCookies] components/content_settings/common/content_settings_manager.mojom

    This is part of a larger effort to replace GURL with SiteForCookies to
    simplify/consolidate comparison and increase safety. This file was found
    by looking for mojom files as follows:
    https://source.chromium.org/search?q=%22mojom.Url%20site_for_cookies%22

    Bug: 577565

components/content_settings/renderer/brave_content_settings_agent_impl_autoplay_browsertest.cc

@@ -36,7 +36,7 @@ class MockContentSettingsManagerImpl : public mojom::ContentSettingsManager {
   void AllowStorageAccess(int32_t render_frame_id,
                           StorageType storage_type,
                           const url::Origin& origin,
-                          const GURL& site_for_cookies,
+                          const ::net::SiteForCookies& site_for_cookies,
                           const url::Origin& top_frame_origin,
                           base::OnceCallback<void(bool)> callback) override {}