Install and launch kiosk app from cached crx file at start up.

chrome/browser/extensions/external_provider_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/external_provider_impl.h"
 
 #include <set>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 16 matching lines @@
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/external_provider_interface.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest.h"
 #include "ui/base/l10n/l10n_util.h"
 
 #if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
 #include "chrome/browser/chromeos/customization_document.h"
 #include "chrome/browser/chromeos/extensions/device_local_account_external_policy_loader.h"
 #include "chrome/browser/chromeos/login/users/user.h"
 #include "chrome/browser/chromeos/login/users/user_manager.h"
 #include "chrome/browser/chromeos/policy/app_pack_updater.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/chromeos/policy/device_local_account.h"
 #include "chrome/browser/chromeos/policy/device_local_account_policy_service.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #else
@@ skipping 344 matching lines @@
         linked_ptr<ExternalProviderInterface>(
             new ExternalProviderImpl(
                 service,
                 external_loader,
                 profile,
                 crx_location,
                 Manifest::EXTERNAL_POLICY_DOWNLOAD,
                 Extension::NO_FLAGS)));
   }
 
+  // No external app install in app mode.

[xiyuan, 2014/07/08 21:51:00]

nit: Update the comment.

[jennyz, 2014/07/12 00:03:21]

Done.

+  if (chrome::IsRunningInForcedAppMode()) {
+#if defined(OS_CHROMEOS)
+    chromeos::KioskAppManager* kiosk_app_manager =
+        chromeos::KioskAppManager::Get();
+    DCHECK(kiosk_app_manager);
+    if (kiosk_app_manager && !kiosk_app_manager->external_loader_created()) {
+      provider_list->push_back(linked_ptr<ExternalProviderInterface>(
+          new ExternalProviderImpl(service,
+                                   kiosk_app_manager->CreateExternalLoader(),
+                                   profile,
+                                   Manifest::EXTERNAL_PREF,
+                                   Manifest::INVALID_LOCATION,
+                                   Extension::NO_FLAGS)));
+    }
+#endif
+    return;
+  }
+
   // In tests don't install extensions from default external sources.
   // It would only slowdown tests and make them flaky.
   if (CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kDisableDefaultApps))
     return;
 
-  // No external app install in app mode.
-  if (chrome::IsRunningInForcedAppMode())
-    return;
-
   // On Mac OS, items in /Library/... should be written by the superuser.
   // Check that all components of the path are writable by root only.
   ExternalPrefLoader::Options check_admin_permissions_on_mac;
 #if defined(OS_MACOSX)
   check_admin_permissions_on_mac =
     ExternalPrefLoader::ENSURE_PATH_CONTROLLED_BY_ADMIN;
 #else
   check_admin_permissions_on_mac = ExternalPrefLoader::NONE;
 #endif
 
@@ skipping 130 matching lines @@
             service,
             new ExternalComponentLoader(profile),
             profile,
             Manifest::INVALID_LOCATION,
             Manifest::EXTERNAL_COMPONENT,
             Extension::FROM_WEBSTORE | Extension::WAS_INSTALLED_BY_DEFAULT)));
   }
 }
 
 }  // namespace extensions