Componentize NetErrorHelperCore

components/error_page/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.
 
-static_library("common") {
+static_library("renderer") {
   sources = [
-    "credential_manager_message_generator.cc",
-    "credential_manager_message_generator.h",
-    "credential_manager_messages.h",
-    "credential_manager_types.cc",
-    "credential_manager_types.h",
+    "net_error_helper_core.cc",
+    "net_error_helper_core.h",
   ]
 
   deps = [
     "//base",
+    "//components/error_page/common",
+    "//components/strings",
     "//content/public/common",
-    "//ipc",
+    "//net",
     "//third_party/WebKit/public:blink",
+    "//ui/base",
     "//url",
   ]
-}
+}