Fixes component extension commands assignment on reload.

extensions/browser/uninstall_reason.h

 // 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 EXTENSIONS_BROWSER_UNINSTALL_REASON_H_
 #define EXTENSIONS_BROWSER_UNINSTALL_REASON_H_
 
 namespace extensions {
 
 enum UninstallReason {
   UNINSTALL_REASON_FOR_TESTING,         // Used for testing code only
   UNINSTALL_REASON_USER_INITIATED,      // User performed some UI gesture
   UNINSTALL_REASON_EXTENSION_DISABLED,  // Extension disabled due to error
   UNINSTALL_REASON_STORAGE_THRESHOLD_EXCEEDED,
   UNINSTALL_REASON_INSTALL_CANCELED,
   UNINSTALL_REASON_MANAGEMENT_API,
   UNINSTALL_REASON_SYNC,
   UNINSTALL_REASON_ORPHANED_THEME,
   UNINSTALL_REASON_ORPHANED_EPHEMERAL_EXTENSION,
   // The entries below imply bypassing checking user has permission to
   // uninstall the corresponding extension id.
   UNINSTALL_REASON_ORPHANED_EXTERNAL_EXTENSION,
   UNINSTALL_REASON_ORPHANED_SHARED_MODULE,
   UNINSTALL_REASON_INTERNAL_MANAGEMENT,  // Internal extensions (see usages)
-  UNINSTALL_REASON_REINSTALL
+  UNINSTALL_REASON_REINSTALL,
+  // Component extensions will only ever install once, but can notify uninstall
+  // repeatedly. crbug.com/458612.

[Finnur, 2015/02/18 11:51:31]

This comment seems out of place. Moving it to where you early-return would
probably help.

Also swap out:
"repeatedly. "
... for 
"repeatedly, see:http://"

[David Tseng, 2015/02/18 18:24:41]

Done.

+  UNINSTALL_REASON_COMPONENT

[Finnur, 2015/02/18 11:51:31]

nit: Add trailing comma.

[David Tseng, 2015/02/18 18:24:41]

Is this convention? This wasn't done before, so leaving as is.

[Finnur, 2015/02/20 10:31:49]

Yes, it is convention to add a trailing comma to prevent churn when checking in
new enums (don't have to modify the line before the one you add, just to add a
trailing comma).

[David Tseng, 2015/02/20 18:12:45]

Makes sense. Done.

 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_UNINSTALL_REASON_H_