[CCA] Disable CCA in Guest mode

Since currently it will crash Chrome when launching CCA (SWA version) in
guest mode. Since for platform app version of CCA, it is not in the
guest mode either, temporarily remove CCA from guest mode until we solve
the crash issue.

Bug: b/174223194
Test: Enter guest mode and CCA is not in the launcher
Change-Id: I10aca86664e84fb70c61d1bc0bef0f8d5da31004
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2560348
Commit-Queue: Wei Lee <wtlee@chromium.org>
Commit-Queue: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Auto-Submit: Wei Lee <wtlee@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#831272}

chrome/browser/web_applications/BUILD.gn

@@ -87,6 +87,7 @@ source_set("web_applications") {
     "//components/services/app_service/public/cpp:app_url_handling",
     "//components/services/app_service/public/cpp:protocol_handling",
     "//components/sync",
+    "//components/user_manager",
     "//content/public/browser",
     "//services/metrics/public/cpp:ukm_builders",
     "//skia",

chrome/browser/web_applications/system_web_app_manager.cc

@@ -35,6 +35,7 @@
 #include "chrome/grit/generated_resources.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/prefs/pref_service.h"
+#include "components/user_manager/user_manager.h"
 #include "components/version_info/version_info.h"
 #include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/url_data_source.h"
@@ -339,7 +340,8 @@ bool SystemWebAppManager::IsAppEnabled(SystemAppType type) {
       return true;
     case SystemAppType::CAMERA:
       return base::FeatureList::IsEnabled(
-          chromeos::features::kCameraSystemWebApp);
+                 chromeos::features::kCameraSystemWebApp) &&
+             !user_manager::UserManager::Get()->IsLoggedInAsGuest();
     case SystemAppType::TERMINAL:
       return true;
     case SystemAppType::MEDIA: