Fix official build in GN

chrome/android/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/android/config.gni")
 import("//build/config/android/rules.gni")
 import("//build/module_args/v8.gni")
 import("//chrome/version.gni")
 import("//testing/test.gni")
 import("//third_party/icu/config.gni")
@@ skipping 459 matching lines @@
   testonly = true
   deps = [
     ":uiautomator_tests_java",
   ]
 }
 
 # GYP: //chrome/chrome_android.gypi:chrome_version_java
 chrome_version_java_dir = "$root_gen_dir/templates/chrome_version_java"
 chrome_version_java_file = "$chrome_version_java_dir/org/chromium/chrome/browser/ChromeVersionConstants.java"
 process_version("chrome_version_java") {
-  source = "java/ChromeVersionConstants.java.version"
+  template_file = "java/ChromeVersionConstants.java.version"
   output = chrome_version_java_file
   extra_args = [
     "-e",
     "CHANNEL=str.upper('$android_channel')",
   ]
 }
 
 zip("chrome_version_srcjar") {
   inputs = [
     chrome_version_java_file,
   ]
   output = "$target_gen_dir/$target_name.srcjar"
   base_dir = chrome_version_java_dir
 }