Introduce WebServiceWorkerNetworkProvider::GetProviderID() and stop static casting

content/renderer/service_worker/service_worker_context_client.cc

 // Copyright 2015 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/renderer/service_worker/service_worker_context_client.h"
 
 #include <map>
 #include <memory>
 #include <utility>
 
@@ skipping 85 matching lines @@
   void WillSendRequest(blink::WebURLRequest& request) override {
     std::unique_ptr<RequestExtraData> extra_data(new RequestExtraData);
     extra_data->set_service_worker_provider_id(provider_->provider_id());
     extra_data->set_originated_from_service_worker(true);
     // Service workers are only available in secure contexts, so all requests
     // are initiated in a secure context.
     extra_data->set_initiated_in_secure_context(true);
     request.SetExtraData(extra_data.release());
   }
 
+  int GetProviderID() const override { return provider_->provider_id(); }
+
  private:
   std::unique_ptr<ServiceWorkerNetworkProvider> provider_;
 };
 
 class StreamHandleListener
     : public blink::WebServiceWorkerStreamHandle::Listener {
  public:
   StreamHandleListener(
       blink::mojom::ServiceWorkerStreamCallbackPtr callback_ptr)
       : callback_ptr_(std::move(callback_ptr)) {}
@@ skipping 1570 matching lines @@
 }
 
 base::WeakPtr<ServiceWorkerContextClient>
 ServiceWorkerContextClient::GetWeakPtr() {
   DCHECK(worker_task_runner_->RunsTasksInCurrentSequence());
   DCHECK(context_);
   return context_->weak_factory.GetWeakPtr();
 }
 
 }  // namespace content