Revert 13676 - Revert 131665 - Add a preference for why an extension is disabled.

chrome/browser/automation/automation_provider.cc

Index: chrome/browser/automation/automation_provider.cc
diff --git a/chrome/browser/automation/automation_provider.cc b/chrome/browser/automation/automation_provider.cc
index 26a5792b01b7e2eb25438b7aac2171f1910975c8..fb5863ec77991d851bffc7a064a7116ee586ab7e 100644
--- a/chrome/browser/automation/automation_provider.cc
+++ b/chrome/browser/automation/automation_provider.cc
@@ -914,7 +914,7 @@ void AutomationProvider::DisableExtension(int extension_handle,
   ExtensionService* service = profile_->GetExtensionService();
   if (extension && service) {
     ExtensionUnloadNotificationObserver observer;
-    service->DisableExtension(extension->id());
+    service->DisableExtension(extension->id(), Extension::DISABLE_USER_ACTION);
     // The extension unload notification should have been sent synchronously
     // with the disable. Just to be safe, check that it was received.
     *success = observer.did_receive_unload_notification();