Make service tab launcher a component

components/service_tab_launcher/BUILD.gn

+# Copyright 2015 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/android/rules.gni")
+
+# GYP: //components/service_tab_launcher:service_tab_launcher
+static_library("service_tab_launcher") {
+  sources = [
+    "browser/android/service_tab_launcher.cc",
+    "browser/android/service_tab_launcher.h",
+    "component_jni_registrar.cc",
+    "component_jni_registrar.h",
+  ]
+
+  deps = [
+    ":service_tab_launcher_jni_headers",
+    "//base",
+    "//content/public/browser",
+  ]
+}
+
+# GYP: //components/service_tab_launcher:service_tab_launcher_java
+android_library("service_tab_launcher_java") {
+  deps = [
+    "//base:base_java",
+    "//content/public/android:content_java",
+  ]
+  DEPRECATED_java_in_dir = "android/java/src"
+}
+
+# GYP: //components/service_tab_launcher:service_tab_launcher_jni_headers
+generate_jni("service_tab_launcher_jni_headers") {
+  sources = [
+    "android/java/src/org/chromium/components/service_tab_launcher/ServiceTabLauncher.java",
+  ]
+  jni_package = "service_tab_launcher"
+}