Enable NativeActivity based Android tests.

testing/test.gni

 # 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.
 
 # ==============================================================================
 # TEST SETUP
 # ==============================================================================
 
 template("_gen_isolate") {
   testonly = true
@@ skipping 45 matching lines @@
     deps = [
       ":${invoker.target_name}__write_deps",
     ]
   }
 }
 
 # Define a test as an executable (or apk on Android) with the "testonly" flag
 # set.
 # Variable:
 #   use_raw_android_executable: Use executable() rather than android_apk().
+#   use_native_activity: Test implements ANativeActivity_onCreate().
 template("test") {
   if (is_android) {
     import("//build/config/android/config.gni")
     import("//build/config/android/rules.gni")
 
     _use_raw_android_executable = defined(invoker.use_raw_android_executable) &&
                                   invoker.use_raw_android_executable
 
     # output_name is used to allow targets with the same name but in different
     # packages to still produce unique runner scripts.
@@ skipping 77 matching lines @@
         }
       }
     } else {
       _library_target = "_${target_name}__library"
       _apk_target = "${target_name}_apk"
       _apk_specific_vars = [
         "android_manifest",
         "enable_multidex",
         "use_default_launcher",
         "write_asset_list",
+        "use_native_activity",
       ]
       shared_library(_library_target) {
         # Configs will always be defined since we set_defaults in BUILDCONFIG.gn.
         configs = []  # Prevent list overwriting warning.
         configs = invoker.configs
         testonly = true
 
         deps = []
         forward_variables_from(invoker,
                                "*",
@@ skipping 168 matching lines @@
     if (defined(invoker.output_name) && target_name != invoker.output_name) {
       group("${invoker.output_name}_run") {
         testonly = true
         deps = [
           ":${invoker.target_name}",
         ]
       }
     }
   }
 }