Install Chrome OS apps to shared location

chrome/browser/extensions/extension_assets_manager.h

+// Copyright (c) 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_EXTENSIONS_EXTENSION_ASSETS_MANAGER_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_ASSETS_MANAGER_H_
+
+#include <string>
+
+#include "base/callback.h"
+#include "base/files/file_path.h"
+
+class Profile;
+
+namespace extensions {
+
+class Extension;
+
+// Assets manager for installed extensions. Some extensions can be installed in
+// shared place for multiple profiles (users). This class manages install and

[asargent_no_longer_on_chrome, 2014/05/20 21:20:25]

nit: "in shared place" -> "in a shared place"

[Dmitry Polukhin, 2014/05/20 23:42:16]

Done.

+// uninstall. At the time being shared location is used for default apps on
+// Chrome OS only. This class must be used only from extension file task runner

[asargent_no_longer_on_chrome, 2014/05/20 21:20:25]

nit: "only from extension file task runner" -> "only from the extension file
task runner"

[Dmitry Polukhin, 2014/05/20 23:42:16]

Done.

+// thread.
+class ExtensionAssetsManager {
+ public:
+  // Callback that is invoked when the extension assets installed.

[asargent_no_longer_on_chrome, 2014/05/20 21:20:25]

nit: "when the extension assets installed" -> "when the extension assets are
installed"

[Dmitry Polukhin, 2014/05/20 23:42:16]

Done.

+  // |file_path| is destination directory on success or empty in case of error.
+  typedef base::Callback<void(const base::FilePath& file_path)>
+      InstallExtensionCallback;
+
+  static ExtensionAssetsManager* GetInstance();
+
+  // Copy extension assets to final location. This location could be under
+  // |local_install_dir| or some common location shared for multiple users.
+  virtual void InstallExtension(const Extension* extension,
+                                const base::FilePath& unpacked_extension_root,
+                                const base::FilePath& local_install_dir,
+                                Profile* profile,
+                                InstallExtensionCallback callback) = 0;
+
+  // Remove extension assets if it is not used by anyone else.
+  virtual void UninstallExtension(const std::string& id,
+                                  Profile* profile,
+                                  const base::FilePath& local_install_dir,
+                                  const base::FilePath& extension_root) = 0;
+
+protected:
+  ExtensionAssetsManager() {}

[asargent_no_longer_on_chrome, 2014/05/20 21:20:25]

Do you need this constructor? 

[Dmitry Polukhin, 2014/05/20 23:42:16]

Done.

+  virtual ~ExtensionAssetsManager() {}
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionAssetsManager);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_ASSETS_MANAGER_H_