Revert of [Android] Refactor the native test wrappers.

content/shell/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("//third_party/icu/config.gni")
 
 generate_jni("content_shell_jni_headers") {
   jni_package = "content/shell"
   sources = [
+    "browsertests_apk/src/org/chromium/content_browsertests_apk/ContentBrowserTestsActivity.java",
     "java/src/org/chromium/content_shell/Shell.java",
     "java/src/org/chromium/content_shell/ShellLayoutTestUtils.java",
     "java/src/org/chromium/content_shell/ShellManager.java",
     "java/src/org/chromium/content_shell/ShellMojoTestUtils.java",
   ]
 }
 
 shared_library("libcontent_shell_content_view") {
   testonly = true
   deps = [
@@ skipping 196 matching lines @@
 
   # GYP: //content/content_tests.gypi:chromium_android_linker_test_jni_headers
   generate_jni("linker_test_jni_headers") {
     testonly = true
     jni_package = "content/shell"
     sources = [
       "linker_test_apk/src/org/chromium/chromium_linker_test_apk/LinkerTests.java",
     ]
   }
 }