Allow extensions to specify that they are not allowed in incognito mode.

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 340 matching lines @@
 
   // Type-related queries.
   bool is_app() const;
   bool is_platform_app() const;
   bool is_hosted_app() const;
   bool is_legacy_packaged_app() const;
   bool is_extension() const;
   bool is_shared_module() const;
   bool is_theme() const;
 
-  bool can_be_incognito_enabled() const;
-
   void AddWebExtentPattern(const URLPattern& pattern);
   const URLPatternSet& web_extent() const { return extent_; }
 
  private:
   friend class base::RefCountedThreadSafe<Extension>;
 
   // Chooses the extension ID for an extension based on a variety of criteria.
   // The chosen ID will be set in |manifest|.
   static bool InitExtensionID(extensions::Manifest* manifest,
                               const base::FilePath& path,
@@ skipping 207 matching lines @@
 
   UpdatedExtensionPermissionsInfo(
       const Extension* extension,
       const PermissionSet* permissions,
       Reason reason);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_EXTENSION_H_