swas: Re-enable Files in kiosk mode

A recent change made it so the Files WebUI would only be enabled if
the SWA was enabled. SWAs are disabled in Kiosk mode but Files is still
needs to be enabled in Kiosk mode.

(cherry picked from commit a60df2b)

Bug: b:285289640
Change-Id: I914d7ee3a32bef6fb51500495744b5e78dbfb394
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4583952
Auto-Submit: Giovanni Ortuno Urquidi <ortuno@chromium.org>
Reviewed-by: Ben Franz <bfranz@chromium.org>
Commit-Queue: Giovanni Ortuno Urquidi <ortuno@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1153103}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4596340
Commit-Queue: Ben Franz <bfranz@chromium.org>
Cr-Commit-Position: refs/branch-heads/5790@{#439}
Cr-Branched-From: 1d71a33-refs/heads/main@{#1148114}

ash/webui/file_manager/BUILD.gn

@@ -46,12 +46,14 @@ static_library("file_manager_ui") {
   deps = [
     ":constants",
     ":file_manager_untrusted_ui",
+    "//ash",
     "//ash/constants:constants",
     "//ash/webui/file_manager/mojom",
     "//ash/webui/file_manager/resources:file_manager_swa_resources",
     "//ash/webui/system_apps/public:system_web_app_config",
     "//ash/webui/system_apps/public:system_web_app_type",
     "//base",
+    "//components/user_manager",
     "//content/public/browser",
     "//ui/file_manager:file_manager_gen_resources",
     "//ui/file_manager:resources",

ash/webui/file_manager/file_manager_ui.cc

@@ -4,14 +4,17 @@
 
 #include "ash/webui/file_manager/file_manager_ui.h"
 
+#include "ash/shell.h"
 #include "ash/webui/file_manager/file_manager_page_handler.h"
 #include "ash/webui/file_manager/resource_loader.h"
 #include "ash/webui/file_manager/resources/grit/file_manager_swa_resources.h"
 #include "ash/webui/file_manager/resources/grit/file_manager_swa_resources_map.h"
+#include "ash/webui/file_manager/url_constants.h"
 #include "base/check_op.h"
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
+#include "components/user_manager/user_type.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui.h"
@@ -26,6 +29,44 @@
 namespace ash {
 namespace file_manager {
 
+namespace {
+
+bool IsKioskSession() {
+  auto* session_controller = Shell::Get()->session_controller();
+  auto account_id = session_controller->GetActiveAccountId();
+  const auto user_type =
+      session_controller->GetUserSessionByAccountId(account_id)->user_info.type;
+
+  switch (user_type) {
+    case user_manager::USER_TYPE_REGULAR:
+    case user_manager::USER_TYPE_CHILD:
+    case user_manager::USER_TYPE_GUEST:
+    case user_manager::USER_TYPE_PUBLIC_ACCOUNT:
+    case user_manager::USER_TYPE_ACTIVE_DIRECTORY:
+      return false;
+    case user_manager::USER_TYPE_KIOSK_APP:
+    case user_manager::USER_TYPE_ARC_KIOSK_APP:
+    case user_manager::USER_TYPE_WEB_KIOSK_APP:
+      return true;
+    case user_manager::NUM_USER_TYPES:
+      NOTREACHED_NORETURN();
+  }
+}
+
+}  // namespace
+
+FileManagerUIConfig::FileManagerUIConfig(
+    SystemWebAppUIConfig::CreateWebUIControllerFunc create_controller_func)
+    : SystemWebAppUIConfig(ash::file_manager::kChromeUIFileManagerHost,
+                           SystemWebAppType::FILE_MANAGER,
+                           create_controller_func) {}
+
+bool FileManagerUIConfig::IsWebUIEnabled(
+    content::BrowserContext* browser_context) {
+  return SystemWebAppUIConfig::IsWebUIEnabled(browser_context) ||
+         IsKioskSession();
+}
+
 FileManagerUI::FileManagerUI(content::WebUI* web_ui,
                              std::unique_ptr<FileManagerUIDelegate> delegate)
     : MojoWebDialogUI(web_ui), delegate_(std::move(delegate)) {

ash/webui/file_manager/file_manager_ui.h

@@ -9,7 +9,6 @@
 
 #include "ash/webui/file_manager/file_manager_ui_delegate.h"
 #include "ash/webui/file_manager/mojom/file_manager.mojom.h"
-#include "ash/webui/file_manager/url_constants.h"
 #include "ash/webui/system_apps/public/system_web_app_ui_config.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_data_source.h"
@@ -33,10 +32,9 @@ class FileManagerUI;
 class FileManagerUIConfig : public SystemWebAppUIConfig<FileManagerUI> {
  public:
   explicit FileManagerUIConfig(
-      SystemWebAppUIConfig::CreateWebUIControllerFunc create_controller_func)
-      : SystemWebAppUIConfig(ash::file_manager::kChromeUIFileManagerHost,
-                             SystemWebAppType::FILE_MANAGER,
-                             create_controller_func) {}
+      SystemWebAppUIConfig::CreateWebUIControllerFunc create_controller_func);
+
+  bool IsWebUIEnabled(content::BrowserContext* browser_context) override;
 };
 
 // The WebUI for chrome://file-manager.