Enforce that apk_under_test is used

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 433 matching lines @@
     "//third_party/android_tools:android_support_v13_java",
     "//third_party/android_tools:android_support_v7_appcompat_java",
     "//ui/android:ui_java",
   ]
   DEPRECATED_java_in_dir = "shell/javatests/src"
 }
 
 # GYP: //chrome/chrome_tests.gypi:chrome_shell_test_apk
 android_apk("chrome_shell_test_apk") {
   testonly = true
+  apk_under_test = ":chrome_shell_apk"
   deps = [
     ":chrome_javatests",
     ":chrome_shell_test_java",
     "//sync/android:sync_javatests",
     "//ui/android:ui_javatests",
   ]
   apk_name = "ChromeShellTest"
   android_manifest = "shell/javatests/AndroidManifest.xml"
 }
 
 # GYP: //chrome/chrome_tests.gypi:chrome_junit_tests
 junit_binary("chrome_junit_tests") {
   java_files =
       [ "junit/src/org/chromium/chrome/browser/omaha/ResponseParserTest.java" ]
   deps = [
     ":chrome_java",
     "//base:base_java",
     "//base:base_java_test_support",
   ]
 }
 
 # GYP: //chrome/chrome_tests.gypi:chrome_sync_shell_test_apk
 if (false) {
   # TODO(GYP): We need sync/sync_tests.gypi:test_support_sync_proto_java to be ported.
   # crbug.com/475612
   android_apk("chrome_sync_shell_test_apk") {
+    apk_under_test = ":chrome_sync_shell_apk"
     testonly = true
     deps = [
       ":chrome_java",
       ":chrome_shell_java",
       ":chrome_shell_test_java",
       "//base:base_java",
       "//base:base_java_test_support",
       "//chrome/test/android:chrome_java_test_support",
       "//components/invalidation:java",
       "//content/public/android:content_java",
@@ skipping 40 matching lines @@
   ]
 }
 
 zip("chrome_version_srcjar") {
   inputs = [
     chrome_version_java_file,
   ]
   output = "$target_gen_dir/$target_name.srcjar"
   base_dir = chrome_version_java_dir
 }