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

chrome/browser/chromeos/app_mode/kiosk_app_external_loader.h

Index: chrome/browser/chromeos/app_mode/kiosk_app_external_loader.h
diff --git a/chrome/browser/chromeos/app_mode/kiosk_app_external_loader.h b/chrome/browser/chromeos/app_mode/kiosk_app_external_loader.h
new file mode 100644
index 0000000000000000000000000000000000000000..576cafb83a457cbbc1f996159fce93c2bc2c3ead
--- /dev/null
+++ b/chrome/browser/chromeos/app_mode/kiosk_app_external_loader.h
@@ -0,0 +1,38 @@
+// Copyright 2014 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_EXTERNAL_LOADER_H_
+#define CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_EXTERNAL_LOADER_H_
+
+#include "base/memory/weak_ptr.h"
+#include "base/values.h"
+#include "chrome/browser/extensions/external_loader.h"
+
+namespace chromeos {
+
+// A custom extensions::ExternalLoader that is created by KioskAppManager and
+// used for install kiosk app extensions.
+class KioskAppExternalLoader
+    : public extensions::ExternalLoader,
+      public base::SupportsWeakPtr<KioskAppExternalLoader> {
+ public:
+  KioskAppExternalLoader();
+
+  // Sets current kiosk app extensions to be loaded.
+  void SetCurrentAppExtensions(scoped_ptr<base::DictionaryValue> prefs);

[xiyuan, 2014/07/08 21:50:59]

nit: #include "base/memory/scoped_ptr.h"

[jennyz, 2014/07/12 00:03:20]

Done.

+
+  // extensions::ExternalLoader overrides:
+  virtual void StartLoading() OVERRIDE;
+
+ private:
+  virtual ~KioskAppExternalLoader();
+
+  base::DictionaryValue kiosk_apps_;
+
+  DISALLOW_COPY_AND_ASSIGN(KioskAppExternalLoader);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_EXTERNAL_LOADER_H_