Make runtime.reload() work with component extensions.

extensions/common/extension.h

 // Copyright (c) 2013 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_COMMON_EXTENSION_H_
 #define EXTENSIONS_COMMON_EXTENSION_H_
 
 #include <algorithm>
 #include <iosfwd>
 #include <map>
@@ skipping 44 matching lines @@
 
   typedef std::map<const std::string, linked_ptr<ManifestData> >
       ManifestDataMap;
 
   enum State {
     DISABLED = 0,
     ENABLED,
     // An external extension that the user uninstalled. We should not reinstall
     // such extensions on startup.
     EXTERNAL_EXTENSION_UNINSTALLED,
-    // Special state for component extensions, since they are always loaded by
-    // the component loader, and should never be auto-installed on startup.
-    ENABLED_COMPONENT,
+    // DEPRECATED: Special state for component extensions.
+    // Maintained as a placeholder since states may be stored to disk.
+    ENABLED_COMPONENT_DEPRECATED,
     NUM_STATES
   };
 
   // Used to record the reason an extension was disabled.
   enum DeprecatedDisableReason {
     DEPRECATED_DISABLE_UNKNOWN,
     DEPRECATED_DISABLE_USER_ACTION,
     DEPRECATED_DISABLE_PERMISSIONS_INCREASE,
     DEPRECATED_DISABLE_RELOAD,
     DEPRECATED_DISABLE_LAST,  // Not used.
@@ skipping 483 matching lines @@
 
   UpdatedExtensionPermissionsInfo(
       const Extension* extension,
       const PermissionSet* permissions,
       Reason reason);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_EXTENSION_H_