[DO NOT COMMIT] routing ID + CHECK

content/child/web_url_loader_impl.cc

 // 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 "content/child/web_url_loader_impl.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 616 matching lines @@
   const RequestExtraData empty_extra_data;
   const RequestExtraData* extra_data;
   if (request.GetExtraData())
     extra_data = static_cast<RequestExtraData*>(request.GetExtraData());
   else
     extra_data = &empty_extra_data;
   extra_data->CopyToResourceRequest(resource_request.get());
 
   if (sync_load_response) {
     DCHECK(defers_loading_ == NOT_DEFERRING);
+    CHECK(request.RequestorID());
     resource_dispatcher_->StartSync(
         std::move(resource_request), request.RequestorID(), sync_load_response,
         request.GetLoadingIPCType(), url_loader_factory_);
     return;
   }
 
   TRACE_EVENT_WITH_FLOW0("loading", "WebURLLoaderImpl::Context::Start", this,
                          TRACE_EVENT_FLAG_FLOW_OUT);
+  CHECK(request.RequestorID());
   request_id_ = resource_dispatcher_->StartAsync(
       std::move(resource_request), request.RequestorID(), task_runner_,
       extra_data->frame_origin(),
       base::MakeUnique<WebURLLoaderImpl::RequestPeerImpl>(this),
       request.GetLoadingIPCType(), url_loader_factory_,
       std::move(consumer_handle));
 
   if (defers_loading_ != NOT_DEFERRING)
     resource_dispatcher_->SetDefersLoading(request_id_, true);
 }
@@ skipping 621 matching lines @@
                                          int intra_priority_value) {
   context_->DidChangePriority(new_priority, intra_priority_value);
 }
 
 void WebURLLoaderImpl::SetLoadingTaskRunner(
     base::SingleThreadTaskRunner* loading_task_runner) {
   context_->SetTaskRunner(loading_task_runner);
 }
 
 }  // namespace content