Cache Storage: Remove unused Service/Embedder Worker plumbing

content/renderer/service_worker/embedded_worker_context_client.cc

Index: content/renderer/service_worker/embedded_worker_context_client.cc
diff --git a/content/renderer/service_worker/embedded_worker_context_client.cc b/content/renderer/service_worker/embedded_worker_context_client.cc
index e2c50d84f61d11842599e6e8e9fc97b23440ca6f..c393502617e0a35f5c06bb8e86131c559e22df19 100644
--- a/content/renderer/service_worker/embedded_worker_context_client.cc
+++ b/content/renderer/service_worker/embedded_worker_context_client.cc
@@ -140,11 +140,6 @@ blink::WebURL EmbeddedWorkerContextClient::scope() const {
   return service_worker_scope_;
 }
 
-blink::WebServiceWorkerCacheStorage*
-    EmbeddedWorkerContextClient::cacheStorage() {
-  return script_context_->cache_storage();
-}
-
 void EmbeddedWorkerContextClient::didPauseAfterDownload() {
   Send(new EmbeddedWorkerHostMsg_DidPauseAfterDownload(embedded_worker_id_));
 }