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

tools/gn/secondary/components/navigation_metrics/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("navigation_metrics") {
+static_library("navigation_metrics") {
   external = true
 
   sources = [
     "navigation_metrics.cc",
     "navigation_metrics.h",
   ]
 
   deps = [
     "//base",
     "//url",
   ]
 }