Enable copresencePrivate API in incognito mode

chrome/browser/extensions/api/copresence_private/copresence_private_api.h

 // Copyright 2014 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_BROWSER_EXTENSIONS_API_COPRESENCE_PRIVATE_COPRESENCE_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_COPRESENCE_PRIVATE_COPRESENCE_PRIVATE_API_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 23 matching lines @@
   void OnWhispernetInitialized(bool success);
 
   // BrowserContextKeyedAPI implementation.
   static BrowserContextKeyedAPIFactory<CopresencePrivateService>*
   GetFactoryInstance();
 
  private:
   friend class BrowserContextKeyedAPIFactory<CopresencePrivateService>;
 
   // BrowserContextKeyedAPI implementation.
+  static const bool kServiceRedirectedInIncognito = true;
   static const char* service_name() { return "CopresencePrivateService"; }
 
   bool initialized_;
   std::map<std::string, audio_modem::WhispernetClient*> whispernet_clients_;
 
   DISALLOW_COPY_AND_ASSIGN(CopresencePrivateService);
 };
 
 template<>
 void BrowserContextKeyedAPIFactory<CopresencePrivateService>
@@ skipping 36 matching lines @@
                              COPRESENCEPRIVATE_SENDINITIALIZED);
 
  protected:
   ~CopresencePrivateSendInitializedFunction() override {}
   ExtensionFunction::ResponseAction Run() override;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_COPRESENCE_PRIVATE_COPRESENCE_PRIVATE_API_H_