Make it possible for a navigator.connect service to receive messages as base::Value.

content/public/browser/navigator_connect_service_factory.h

 // Copyright 2015 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 CONTENT_PUBLIC_BROWSER_NAVIGATOR_CONNECT_SERVICE_FACTORY_H_
 #define CONTENT_PUBLIC_BROWSER_NAVIGATOR_CONNECT_SERVICE_FACTORY_H_
 
 #include "base/callback.h"
 
 class GURL;
 
 namespace content {
 
 struct NavigatorConnectClient;
 class MessagePortDelegate;
 
 // Implement this interface to provide a new kind of navigator.connect
 // accessible service.
 // Instances of this class are owned by NavigatorConnectContext. Register new
 // factories by calling NavigatorConnectContext::AddFactory.
 class NavigatorConnectServiceFactory {
  public:
   // Call with nullptr to indicate connection failure. Ownership of the delegate
   // remains with the factory. It is assumed that for the passed
   // MessagePortDelegate implementation the route_id and message_port_id of a
   // connection are the same.
-  using ConnectCallback = base::Callback<void(MessagePortDelegate*)>;
+  // Pass true to |data_as_values| if the delegate expects to receive messages
+  // from the client encoded as base::Value instead of the normal serialization
+  // format.
+  using ConnectCallback =
+      base::Callback<void(MessagePortDelegate*, bool data_as_values)>;
 
   virtual ~NavigatorConnectServiceFactory() {}
 
   // Return true if this factory is responsible for handling connections to the
   // |target_url|. The most recently added factory that returns true for a
   // particular url is picked to handle the connection attempt.
   virtual bool HandlesUrl(const GURL& target_url) = 0;
 
   // Called to try to establish a connection. Only called if this factory was
   // the most recently added factory that returned true from |HandlesUrl| for
   // the url being connected to.
   virtual void Connect(const NavigatorConnectClient& client,
                        const ConnectCallback& callback) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATOR_CONNECT_SERVICE_FACTORY_H_