Replace usages of DEPRECATED_java_in_dir with java_files

components/signin/core/browser/android/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 version: components/signin.gypi:signin_core_browser_jni_headers
 generate_jni("jni_headers") {
   sources = [
     "java/src/org/chromium/components/signin/ChildAccountInfoFetcher.java",
   ]
   jni_package = "components/signin"
 }
 
 # GYP version: components/signin.gypi:signin_core_browser_java
 android_library("java") {
   deps = [
     "//base:base_java",
     "//sync/android:sync_java",
   ]
 
-  DEPRECATED_java_in_dir = "java/src"
+  java_files =
+      [ "java/src/org/chromium/components/signin/ChildAccountInfoFetcher.java" ]
 }