[Android] Generate scripts at build time to run android tests.

media/midi/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/config.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//testing/test.gni")
 
@@ skipping 137 matching lines @@
   ]
 
   configs += [ ":midi_config" ]
   deps = [
     ":midi",
     "//base/test/:run_all_unittests",
     "//base/test/:test_support",
     "//testing/gtest",
   ]
 
+  if (is_android) {
+    isolate_file = "midi_unittests.isolate"
+  }
+
   if (!is_android) {
     sources += usb_midi_sources
   }
 
   if (is_mac) {
     sources += [ "midi_manager_mac_unittest.cc" ]
   }
 
   if (use_alsa && use_udev) {
     sources += [ "midi_manager_alsa_unittest.cc" ]
   }
 
   if (use_x11) {
     deps += [ "//tools/xdisplaycheck" ]
   }
 }