Headless: Remove obsolete Mojo code and some other obsolete APIs

headless/public/util/generic_url_request_job_test.cc

 // Copyright 2016 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.
 
 #include "headless/public/util/generic_url_request_job.h"
 
 #include <memory>
 #include <string>
 #include <vector>
 
@@ skipping 119 matching lines @@
         job_delegate_(job_delegate),
         dispatcher_(dispatcher) {}
 
   // net::URLRequestJobFactory::ProtocolHandler override.
   net::URLRequestJob* MaybeCreateJob(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate) const override {
     return new GenericURLRequestJob(
         request, network_delegate, dispatcher_,
         base::MakeUnique<MockFetcher>(fetch_request_, json_fetch_reply_map_),
-        job_delegate_);
+        job_delegate_, nullptr);
   }
 
  private:
   base::DictionaryValue* fetch_request_;          // NOT OWNED
   std::map<std::string, std::string>* json_fetch_reply_map_;  // NOT OWNED
   GenericURLRequestJob::Delegate* job_delegate_;  // NOT OWNED
   URLRequestDispatcher* dispatcher_;              // NOT OWNED
 };
 
 }  // namespace
@@ skipping 504 matching lines @@
         pending_request->AllowRequest();
       },
       &post_data));
 
   CreateAndCompletePostJob(GURL("https://example.com"), "payload", reply);
 
   EXPECT_EQ("payload", post_data);
 }
 
 }  // namespace headless