ServiceWorker request intercept plan 2: Add set_job_factory to URLRequestJob

net/url_request/url_request_job_manager.cc

 // Copyright (c) 2012 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 "net/url_request/url_request_job_manager.h"
 
 #include <algorithm>
 
 #include "base/memory/singleton.h"
 #include "build/build_config.h"
@@ skipping 37 matching lines @@
 URLRequestJob* URLRequestJobManager::CreateJob(
     URLRequest* request, NetworkDelegate* network_delegate) const {
   DCHECK(IsAllowedThread());
 
   // If we are given an invalid URL, then don't even try to inspect the scheme.
   if (!request->url().is_valid())
     return new URLRequestErrorJob(request, network_delegate, ERR_INVALID_URL);
 
   // We do this here to avoid asking interceptors about unsupported schemes.
   const URLRequestJobFactory* job_factory = NULL;
-  job_factory = request->context()->job_factory();
+  const std::string& scheme = request->url().scheme();  // already lowercase
 
-  const std::string& scheme = request->url().scheme();  // already lowercase
+  // Use request-specific job factory if it is given.
+  job_factory = request->job_factory();
+  if (!job_factory || !job_factory->IsHandledProtocol(scheme)) {
+    // Otherwise use the request context's factory.
+    job_factory = request->context()->job_factory();
+  }
+
   if (job_factory) {
     if (!job_factory->IsHandledProtocol(scheme)) {
       return new URLRequestErrorJob(
           request, network_delegate, ERR_UNKNOWN_URL_SCHEME);
     }
   } else if (!SupportsScheme(scheme)) {
     return new URLRequestErrorJob(
         request, network_delegate, ERR_UNKNOWN_URL_SCHEME);
   }
 
@@ skipping 177 matching lines @@
 }
 
 URLRequestJobManager::URLRequestJobManager()
     : allowed_thread_(0),
       allowed_thread_initialized_(false) {
 }
 
 URLRequestJobManager::~URLRequestJobManager() {}
 
 }  // namespace net