Skip extension management policy checks when installing a bookmark app.

chrome/browser/extensions/crx_installer.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_CRX_INSTALLER_H_
 #define CHROME_BROWSER_EXTENSIONS_CRX_INSTALLER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 327 matching lines @@
   // cause unnecessary unpacking of an extension at every restart.
   // See also |fail_install_if_unexpected_version_|!
   base::Version expected_version_;
 
   // If true, installation will fail if the actual version doesn't match
   // |expected_version_|. If false, the extension will still be installed, but
   // not granted any permissions.
   bool fail_install_if_unexpected_version_;
 
   // Whether manual extension installation is enabled. We can't just check this
-  // before trying to install because themes are special-cased to always be
-  // allowed.
+  // before trying to install because themes and bookmark apps are special-cased
+  // to always be allowed.
   bool extensions_enabled_;
 
   // Whether we're supposed to delete the source file on destruction. Defaults
   // to false.
   bool delete_source_;
 
   // Whether to create an app shortcut after successful installation. This is
   // set based on the user's selection in the UI and can only ever be true for
   // apps.
   bool create_app_shortcut_;
@@ skipping 82 matching lines @@
 
   // Performs requirements, policy and blacklist checks on the extension.
   ExtensionInstallChecker install_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(CrxInstaller);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_CRX_INSTALLER_H_