[CCA] Enable CCA under guest mode

Bug: b/172343942
Test: CCA is shown under guest mode
Change-Id: If3c39c52c81287d7493783d2d1e8ae352821b22b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2592213Reviewed-by: Shik Chen <shik@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Commit-Queue: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Auto-Submit: Wei Lee <wtlee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837910}

chrome/browser/web_applications/system_web_app_manager.cc

@@ -357,8 +357,7 @@ bool SystemWebAppManager::IsAppEnabled(SystemAppType type) {
       return true;
     case SystemAppType::CAMERA:
       return base::FeatureList::IsEnabled(
-                 chromeos::features::kCameraSystemWebApp) &&
-             !user_manager::UserManager::Get()->IsLoggedInAsGuest();
+          chromeos::features::kCameraSystemWebApp);
     case SystemAppType::TERMINAL:
       return true;
     case SystemAppType::MEDIA: