New post-sideload UI:

chrome/common/extensions/feature_switch.h

 // Copyright (c) 2012 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 CHROME_COMMON_EXTENSIONS_FEATURE_SWITCH_H_
 #define CHROME_COMMON_EXTENSIONS_FEATURE_SWITCH_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 
 class CommandLine;
 
 namespace extensions {
 
 // A switch that can turn a feature on or off. Typically controlled via
 // command-line switches but can be overridden, e.g., for testing.
 class FeatureSwitch {
  public:
   static FeatureSwitch* action_box();
   static FeatureSwitch* easy_off_store_install();
   static FeatureSwitch* extensions_in_action_box();
   static FeatureSwitch* script_badges();
   static FeatureSwitch* script_bubble();
+  static FeatureSwitch* prompt_for_external_extensions();
 
   enum DefaultValue {
     DEFAULT_ENABLED,
     DEFAULT_DISABLED
   };
 
   enum OverrideValue {
     OVERRIDE_NONE,
     OVERRIDE_ENABLED,
     OVERRIDE_DISABLED
@@ skipping 34 matching lines @@
   const char* switch_name_;
   bool default_value_;
   OverrideValue override_value_;
 
   DISALLOW_COPY_AND_ASSIGN(FeatureSwitch);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_FEATURE_SWITCH_H_