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

components/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
 # Collection of all components. You wouldn't link to this, but this is rather
@@ skipping 281 matching lines @@
     "//components/webcrypto:unit_tests",
     "//components/webdata/common:unit_tests",
 
     # These are the deps required by the code in this target.
     "//base",
     "//base/test:test_support",
     "//content/test:test_support",
     "//net",
     "//ui/base",
   ]
+
+  if (is_android) {
+    isolate_file = "components_unittests.isolate"
+  }
+
   data_deps = [ ":components_tests_pak" ]
 
   if (!is_android && !is_ios) {
     deps += [ "//components/proximity_auth:unit_tests" ]
   }
 
   # TODO(GYP) need this target.
   #'breakpad/app/crash_keys_win_unittest.cc',
 
   # Precache tests need these defines.
@@ skipping 84 matching lines @@
     sources += [
       "test/android/browsertests_apk/components_browser_tests_android.cc",
       "test/android/browsertests_apk/components_browser_tests_android.h",
       "test/android/browsertests_apk/components_browser_tests_jni_onload.cc",
     ]
     sources -= [ "autofill/content/browser/risk/fingerprint_browsertest.cc" ]
     deps += [
       ":components_browsertests_jni_headers",
       "//testing/android/native_test:native_test_util",
     ]
-
     use_launcher = false
+    isolate_file = "components_browsertests.isolate"
   }
 
   if (is_linux) {
     # content_extractor_browsertest is a standalone content extraction tool built as
     # a MANUAL component_browsertest.
     sources += [ "dom_distiller/standalone/content_extractor_browsertest.cc" ]
     deps += [
       "pref_registry:test_support",
       "//base:prefs_test_support",
     ]
@@ skipping 11 matching lines @@
 
   deps = [
     "//base",
     "//base/test:test_support_perf",
     "//testing/gtest",
     "//testing/perf",
     "//content/test:test_support",
     "//components/visitedlink/browser",
   ]
 }