Move service_worker_type_converters to content/renderer to avoid WebString() usage in browser

content/renderer/BUILD.gn

 # 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.
 
 import("//build/config/chromecast_build.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//media/media_options.gni")
 import("//ppapi/features/features.gni")
@@ skipping 328 matching lines @@
     "service_worker/embedded_worker_devtools_agent.cc",
     "service_worker/embedded_worker_devtools_agent.h",
     "service_worker/embedded_worker_dispatcher.cc",
     "service_worker/embedded_worker_dispatcher.h",
     "service_worker/embedded_worker_instance_client_impl.cc",
     "service_worker/embedded_worker_instance_client_impl.h",
     "service_worker/service_worker_context_client.cc",
     "service_worker/service_worker_context_client.h",
     "service_worker/service_worker_context_message_filter.cc",
     "service_worker/service_worker_context_message_filter.h",
+    "service_worker/service_worker_type_converters.cc",
+    "service_worker/service_worker_type_converters.h",
     "service_worker/service_worker_type_util.cc",
     "service_worker/service_worker_type_util.h",
     "shared_memory_seqlock_reader.cc",
     "shared_memory_seqlock_reader.h",
     "shared_worker/embedded_shared_worker_content_settings_client_proxy.cc",
     "shared_worker/embedded_shared_worker_content_settings_client_proxy.h",
     "shared_worker/embedded_shared_worker_stub.cc",
     "shared_worker/embedded_shared_worker_stub.h",
     "shared_worker/shared_worker_repository.cc",
     "shared_worker/shared_worker_repository.h",
@@ skipping 578 matching lines @@
     # For the defines in mojo_media_config.
     public_configs = [ "//media/mojo/services:mojo_media_config" ]
   }
 
   if (!is_component_build) {
     public_deps = [
       ":renderer",
     ]
   }
 }