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

extensions/common/manifest_handlers/incognito_info.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_MANIFEST_HANDLERS_INCOGNITO_INFO_H_
 #define EXTENSIONS_COMMON_MANIFEST_HANDLERS_INCOGNITO_INFO_H_
 
 #include "base/strings/string16.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_handler.h"
 
 namespace extensions {
 
 struct IncognitoInfo : public Extension::ManifestData {
-  explicit IncognitoInfo(bool split_mode);
+  enum Mode { SPLIT, SPANNING, NOT_ALLOWED };
+
+  explicit IncognitoInfo(Mode mode);
+
   ~IncognitoInfo() override;
 
   // If true, a separate process will be used for the extension in incognito
   // mode.
-  bool split_mode;
+  Mode mode;
 
   // Return the incognito mode information for the given |extension|.
   static bool IsSplitMode(const Extension* extension);
+
+  // Return whether this extension can be run in incognito mode as specified
+  // in its manifest.
+  static bool IsIncognitoAllowed(const Extension* extension);
 };
 
 // Parses the "incognito" manifest key.
 class IncognitoHandler : public ManifestHandler {
  public:
   IncognitoHandler();
   ~IncognitoHandler() override;
 
   bool Parse(Extension* extension, base::string16* error) override;
   bool AlwaysParseForType(Manifest::Type type) const override;
 
  private:
   const std::vector<std::string> Keys() const override;
 
   DISALLOW_COPY_AND_ASSIGN(IncognitoHandler);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_MANIFEST_HANDLERS_INCOGNITO_INFO_H_