PS - Remove Clipboard Read permission from extensions in Public Sessions (except for whitelisted on…

chrome/browser/chromeos/extensions/permissions_updater_delegate_chromeos.h

+// Copyright 2017 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_EXTENSIONS_PERMISSIONS_UPDATER_DELEGATE_CHROMEOS_H_
+#define CHROME_BROWSER_CHROMEOS_EXTENSIONS_PERMISSIONS_UPDATER_DELEGATE_CHROMEOS_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "chrome/browser/extensions/permissions_updater.h"
+
+namespace extensions {
+
+class Extension;
+class PermissionSet;
+
+// In Public Sessions, apps and extensions are force-installed by admin policy
+// so the user does not get a chance to review the permissions for these apps.
+// This is not acceptable from a security standpoint, so we remove ClipboardRead

[Devlin, 2017/04/08 00:30:51]

This comment starts to get very specific, and is probably better placed where we
remove the clipboardRead permission.  We could keep this class comment a bit
more general by saying something like "remove the permissions that violate
security or privacy in public sessions".

[Ivan Šandrk, 2017/04/10 12:04:35]

Done.

+// permission from them (except for whitelisted ones - eg. remote desktop
+// clients). This forceful removal of permission is safe since the clipboard
+// pasting code checks for this permission before doing the paste (the end
+// result is just an empty paste).
+class PermissionsUpdaterDelegateChromeOS : public PermissionsUpdater::Delegate {
+ public:
+  PermissionsUpdaterDelegateChromeOS();
+  ~PermissionsUpdaterDelegateChromeOS() override;
+
+  // PermissionsUpdater::Delegate
+  void InitializePermissions(
+      const Extension* extension,
+      std::unique_ptr<const PermissionSet>* granted_permissions) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PermissionsUpdaterDelegateChromeOS);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_PERMISSIONS_UPDATER_DELEGATE_CHROMEOS_H_