Convert utility process WiFi Credentials IPC to mojo

chrome/common/extensions/BUILD.gn

 # Copyright 2016 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/features.gni")
 import("//extensions/features/features.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//tools/json_schema_compiler/json_features.gni")
 
 assert(enable_extensions)
@@ skipping 10 matching lines @@
   public_deps = [
     ":extension_features_unittest",
   ]
 }
 
 mojom("mojo_bindings") {
   sources = [
     "media_parser.mojom",
   ]
 
+  if (is_win) {
+    sources += [ "wifi_credentials_getter.mojom" ]
+  }
+
   public_deps = [
     "//mojo/common:common_custom_types",
   ]
 }