Make runtime.reload() work with component extensions.

extensions/common/extension.h

Index: extensions/common/extension.h
diff --git a/extensions/common/extension.h b/extensions/common/extension.h
index a429d59286d67ee4eaba77a59dd633c9236ca02a..21bd474d20997a17fc1bc47d6d687678891ad5fe 100644
--- a/extensions/common/extension.h
+++ b/extensions/common/extension.h
@@ -62,9 +62,6 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
     // 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,

[tapted, 2014/08/13 00:25:07]

It's annoying, but I think we need to keep a placeholder here, since preferences
will have this enum value stored to disk. If someone adds another (unlikely), it
needs to start at 4 not 3. Probably just ENABLED_COMPONENT_DEPRECATED -
hopefully we don't have to mention it anywhere else.

[Anand Mistry (off Chromium), 2014/08/13 01:53:15]

Done.

     NUM_STATES
   };