Add BUILD.gn file for components's translate_common target.

tools/gn/secondary/components/startup_metric_utils/BUILD.gn

 # Copyright 2013 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.
 
-component("startup_metric_utils") {
+static_library("startup_metric_utils") {
   external = true
 
   sources = [
     "startup_metric_utils.cc",
     "startup_metric_utils.h",
   ]
 
   deps = [
     "//base",
   ]
 }