Convert some component source sets to static library

components/translate/core/language_detection/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/features.gni")
 
-source_set("language_detection") {
+static_library("language_detection") {
   sources = [
     "language_detection_util.cc",
     "language_detection_util.h",
   ]
 
   deps = [
     "//base",
     "//components/translate/core/common",
     "//third_party/cld_2",
     "//url",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "language_detection_util_unittest.cc",
   ]
   deps = [
     ":language_detection",
     "//base",
     "//components/translate/core/common",
     "//testing/gtest",
     "//url",
   ]
 }