Give URLRequestJobFactory::Interceptors the ability to specify protocols they handle.

net/url_request/url_request_job_factory.h

 // Copyright (c) 2011 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 NET_URL_REQUEST_URL_REQUEST_JOB_FACTORY_H_
 #define NET_URL_REQUEST_URL_REQUEST_JOB_FACTORY_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 39 matching lines @@
     // Called after having received a final response, but prior to the
     // the request delegate being informed of the response. This is also
     // called when there is no server response at all to allow interception
     // on DNS or network errors. Can return a new job to replace the existing
     // job if it should be intercepted, or NULL to allow the normal handling to
     // continue. If a new job is provided, the delegate never sees the original
     // response, instead the response produced by the intercept job will be
     // returned.
     virtual URLRequestJob* MaybeInterceptResponse(
         URLRequest* request) const = 0;
+
+    // Returns true if this interceptor handles requests for URLs with the
+    // given protocol. Returning false does not imply that this interceptor
+    // can't or won't handle requests with the given protocol.
+    virtual bool WillHandleProtocol(const std::string& protocol) const {
+        return false;
+    }
   };
 
   URLRequestJobFactory();
   ~URLRequestJobFactory();
 
   // Sets the ProtocolHandler for a scheme. Returns true on success, false on
   // failure (a ProtocolHandler already exists for |scheme|). On success,
   // URLRequestJobFactory takes ownership of |protocol_handler|.
   bool SetProtocolHandler(const std::string& scheme,
                           ProtocolHandler* protocol_handler);
@@ skipping 17 matching lines @@
 
   ProtocolHandlerMap protocol_handler_map_;
   InterceptorList interceptors_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestJobFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_JOB_FACTORY_H_