Pass data saver pref value into embedded worker

content/common/service_worker/embedded_worker_messages.h

 // 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.
 
 // Message definition file, included multiple times, hence no include guard.
 
 #include <stdint.h>
 
 #include <string>
 
+#include "content/common/service_worker/embedded_worker_settings.h"
 #include "content/public/common/web_preferences.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_param_traits.h"
 #include "url/gurl.h"
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 
 #define IPC_MESSAGE_START EmbeddedWorkerMsgStart
 
+IPC_STRUCT_TRAITS_BEGIN(content::EmbeddedWorkerSettings)
+  IPC_STRUCT_TRAITS_MEMBER(v8_cache_options)
+  IPC_STRUCT_TRAITS_MEMBER(data_saver_enabled)
+IPC_STRUCT_TRAITS_END()
+
 // Parameters structure for EmbeddedWorkerMsg_StartWorker.
 IPC_STRUCT_BEGIN(EmbeddedWorkerMsg_StartWorker_Params)
   IPC_STRUCT_MEMBER(int, embedded_worker_id)
   IPC_STRUCT_MEMBER(int64_t, service_worker_version_id)
   IPC_STRUCT_MEMBER(GURL, scope)
   IPC_STRUCT_MEMBER(GURL, script_url)
   IPC_STRUCT_MEMBER(int, worker_devtools_agent_route_id)
   IPC_STRUCT_MEMBER(bool, wait_for_debugger)
-  IPC_STRUCT_MEMBER(content::V8CacheOptions, v8_cache_options)
+  IPC_STRUCT_MEMBER(content::EmbeddedWorkerSettings, settings)
 IPC_STRUCT_END()
 
 // Parameters structure for EmbeddedWorkerHostMsg_ReportConsoleMessage.
 // The data members directly correspond to parameters of
 // WorkerMessagingProxy::reportConsoleMessage()
 IPC_STRUCT_BEGIN(EmbeddedWorkerHostMsg_ReportConsoleMessage_Params)
   IPC_STRUCT_MEMBER(int, source_identifier)
   IPC_STRUCT_MEMBER(int, message_level)
   IPC_STRUCT_MEMBER(base::string16, message)
   IPC_STRUCT_MEMBER(int, line_number)
@@ skipping 63 matching lines @@
 // for this for easier cross-thread message dispatching.
 
 #undef IPC_MESSAGE_START
 #define IPC_MESSAGE_START EmbeddedWorkerContextMsgStart
 
 // Browser -> Renderer message to send message.
 IPC_MESSAGE_CONTROL3(EmbeddedWorkerContextMsg_MessageToWorker,
                      int /* thread_id */,
                      int /* embedded_worker_id */,
                      IPC::Message /* message */)