Generalize content::URLDataSource so that it can be used by the network service.

ios/web/webui/url_data_manager_ios_backend.mm

 // 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.
 
 #include "ios/web/webui/url_data_manager_ios_backend.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 417 matching lines @@
 
 bool URLDataManagerIOSBackend::StartRequest(const net::URLRequest* request,
                                             URLRequestChromeJob* job) {
   if (!CheckURLIsValid(request->url()))
     return false;
 
   URLDataSourceIOSImpl* source = GetDataSourceFromURL(request->url());
   if (!source)
     return false;
 
-  if (!source->source()->ShouldServiceRequest(request))
+  if (!source->source()->ShouldServiceRequest(request->url()))
     return false;
 
   std::string path;
   URLToRequestPath(request->url(), &path);
-  source->source()->WillServiceRequest(request, &path);
 
   // Save this request so we know where to send the data.
   RequestID request_id = next_request_id_++;
   pending_requests_.insert(std::make_pair(request_id, job));
 
   job->set_allow_caching(source->source()->AllowCaching());
   job->set_add_content_security_policy(true);
   job->set_content_security_policy_object_source(
       source->source()->GetContentSecurityPolicyObjectSrc());
   job->set_content_security_policy_frame_source("frame-src 'none';");
@@ skipping 62 matching lines @@
   // Forward this data on to the pending net::URLRequest, if it exists.
   PendingRequestMap::iterator i = pending_requests_.find(request_id);
   if (i != pending_requests_.end()) {
     URLRequestChromeJob* job(i->second);
     pending_requests_.erase(i);
     job->DataAvailable(bytes);
   }
 }
 
 }  // namespace web