Add a policy to disable mounting of external storage.

chrome/common/pref_names.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/common/pref_names.h"
 
 #include "base/basictypes.h"
 
 namespace prefs {
 
@@ skipping 1760 matching lines @@
 // them to the policy server.
 const char kDeviceActivityTimes[] = "device_status.activity_times";
 
 // A pref holding the last known location when device location reporting is
 // enabled.
 const char kDeviceLocation[] = "device_status.location";
 
 // A string that is used to store first-time sync startup after once sync is
 // disabled. This will be refreshed every sign-in.
 const char kSyncSpareBootstrapToken[] = "sync.spare_bootstrap_token";
+
+// A pref holding the value of the policy used to disable mounting of external
+// storage for the user.
+const char kExternalStorageDisabled[] = "hardware.external_storage_disabled";
 #endif
 
 // Whether there is a Flash version installed that supports clearing LSO data.
 const char kClearPluginLSODataEnabled[] = "browser.clear_lso_data_enabled";
 
 // Whether we should show Pepper Flash-specific settings.
 const char kPepperFlashSettingsEnabled[] =
     "browser.pepper_flash_settings_enabled";
 
 // String which specifies where to store the disk cache.
@@ skipping 200 matching lines @@
 const char kNetworkProfileLastWarningTime[] =
     "network_profile.last_warning_time";
 
 #if defined(OS_MACOSX)
 // A timestamp of when the obsolete OS infobar was last shown to a user on 10.5.
 const char kMacLeopardObsoleteInfobarLastShown[] =
     "mac_105_obsolete_infobar_last_shown";
 #endif  // defined(OS_MACOSX)
 
 }  // namespace prefs