Implement the infrastructure of creating WorkerFetchContext in worker global scope.

content/renderer/service_worker/service_worker_context_client.h

Index: content/renderer/service_worker/service_worker_context_client.h
diff --git a/content/renderer/service_worker/service_worker_context_client.h b/content/renderer/service_worker/service_worker_context_client.h
index f22039ece12c591a05cea1e1a2fdb3f08aeb8224..93c8e95c2fea837312114907a05059d50b539cca 100644
--- a/content/renderer/service_worker/service_worker_context_client.h
+++ b/content/renderer/service_worker/service_worker_context_client.h
@@ -60,6 +60,7 @@ class ServiceWorkerProviderContext;
 class ServiceWorkerContextClient;
 class ThreadSafeSender;
 class EmbeddedWorkerInstanceClientImpl;
+class WebWorkerFetchContextInfo;
 
 // This class provides access to/from an ServiceWorker's WorkerGlobalScope.
 // Unless otherwise noted, all methods are called on the worker thread.
@@ -190,6 +191,8 @@ class ServiceWorkerContextClient : public blink::WebServiceWorkerContextClient,
   // Called on the main thread.
   blink::WebServiceWorkerNetworkProvider* CreateServiceWorkerNetworkProvider()
       override;
+  blink::WebWorkerFetchContextInfo* CreateServiceWorkerFetchContextInfo()
+      override;
   blink::WebServiceWorkerProvider* CreateServiceWorkerProvider() override;
 
   void PostMessageToClient(const blink::WebString& uuid,
@@ -320,6 +323,7 @@ class ServiceWorkerContextClient : public blink::WebServiceWorkerContextClient,
   const int64_t service_worker_version_id_;
   const GURL service_worker_scope_;
   const GURL script_url_;
+  int network_provider_id_ = kInvalidServiceWorkerProviderId;
   scoped_refptr<ThreadSafeSender> sender_;
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
   scoped_refptr<base::TaskRunner> worker_task_runner_;