Move the new WebUI's code to read the data off the IO thread as it's generally from the memory-mapp…

content/browser/webui/url_data_manager_backend.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 "content/browser/webui/url_data_manager_backend.h"
 
 #include <set>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 492 matching lines @@
   for (PendingRequestMap::const_iterator i = pending_requests_.begin();
        i != pending_requests_.end(); ++i) {
     if (i->second == job)
       return true;
   }
   return false;
 }
 
 bool URLDataManagerBackend::StartRequest(const net::URLRequest* request,
                                          URLRequestChromeJob* job) {
-  // NOTE: this duplicates code in web_ui_url_loader_factory.cc's URLLoaderImpl.
+  // NOTE: this duplicates code in web_ui_url_loader_factory.cc's
+  // StartURLLoader.
   if (!CheckURLIsValid(request->url()))
     return false;
 
   URLDataSourceImpl* source = GetDataSourceFromURL(request->url());
   if (!source)
     return false;
 
   const ResourceRequestInfo* info = ResourceRequestInfo::ForRequest(request);
   if (!source->source()->ShouldServiceRequest(
           request->url(), info ? info->GetContext() : nullptr,
@@ skipping 212 matching lines @@
 }
 
 }  // namespace
 
 net::URLRequestJobFactory::ProtocolHandler* CreateDevToolsProtocolHandler(
     ResourceContext* resource_context) {
   return new DevToolsJobFactory(resource_context);
 }
 
 }  // namespace content