Fixed how Apps Developer Tools is enabled/disabled

chrome/browser/extensions/extension_service.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_service.h"
 
 #include <algorithm>
 #include <iterator>
 #include <set>
 
@@ skipping 1943 matching lines @@
     extensions_.Remove(extension->id());
     NotifyExtensionUnloaded(extension.get(), reason);
   }
 
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_REMOVED,
       content::Source<Profile>(profile_),
       content::Details<const Extension>(extension.get()));
 }
 
+void ExtensionService::RemoveComponentExtension(
+    const std::string& extension_id) {
+  scoped_refptr<const Extension> extension(
+      GetExtensionById(extension_id, false));
+  UnloadExtension(extension_id, extension_misc::UNLOAD_REASON_UNINSTALL);
+  content::NotificationService::current()->Notify(
+      chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
+      content::Source<Profile>(profile_),
+      content::Details<const Extension>(extension.get()));
+}
+
 void ExtensionService::UnloadAllExtensions() {
   profile_->GetExtensionSpecialStoragePolicy()->RevokeRightsForAllExtensions();
 
   extensions_.Clear();
   disabled_extensions_.Clear();
   terminated_extensions_.Clear();
   extension_runtime_data_.clear();
 
   // TODO(erikkay) should there be a notification for this?  We can't use
   // EXTENSION_UNLOADED since that implies that the extension has been disabled
@@ skipping 1189 matching lines @@
 }
 
 void ExtensionService::AddUpdateObserver(extensions::UpdateObserver* observer) {
   update_observers_.AddObserver(observer);
 }
 
 void ExtensionService::RemoveUpdateObserver(
     extensions::UpdateObserver* observer) {
   update_observers_.RemoveObserver(observer);
 }