Register for cookie, image, javascript and sound in chrome://media-app

Currently user settings for default websites that may block these web
features leak into system apps unless explicitly auto-granted.

Bug: b/163088459
Change-Id: I22fb8bfcdd3a83c1a054c663bda0e54f89a6c238
Test: Open an image from ChromeOS Files app after setting chrome://settings/content/javascript to "Blocked"
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2358940
Commit-Queue: dstockwell <dstockwell@google.com>
Commit-Queue: Trent Apted <tapted@chromium.org>
Reviewed-by: dstockwell <dstockwell@google.com>
Cr-Commit-Position: refs/heads/master@{#798534}

chromeos/components/media_app_ui/media_app_ui.cc

@@ -82,10 +82,15 @@ MediaAppUI::MediaAppUI(content::WebUI* web_ui,
   auto* allowlist = WebUIAllowlist::GetOrCreate(browser_context);
   const url::Origin host_origin =
       url::Origin::Create(GURL(kChromeUIMediaAppURL));
-  allowlist->RegisterAutoGrantedPermission(
-      host_origin, ContentSettingsType::FILE_SYSTEM_READ_GUARD);
-  allowlist->RegisterAutoGrantedPermission(
-      host_origin, ContentSettingsType::FILE_SYSTEM_WRITE_GUARD);
+  allowlist->RegisterAutoGrantedPermissions(
+      host_origin, {
+                       ContentSettingsType::COOKIES,
+                       ContentSettingsType::FILE_SYSTEM_READ_GUARD,
+                       ContentSettingsType::FILE_SYSTEM_WRITE_GUARD,
+                       ContentSettingsType::IMAGES,
+                       ContentSettingsType::JAVASCRIPT,
+                       ContentSettingsType::SOUND,
+                   });
 
   content::WebUIDataSource* untrusted_source =
       CreateMediaAppUntrustedDataSource(delegate_.get());