Relanding "Multiprocess test client: Android child process launcher rework."

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 2125 matching lines @@
     "test/data/",
   ]
 
   # Allow more direct string conversions on platforms with native utf8
   # strings
   if (is_mac || is_ios || is_chromeos || is_chromecast) {
     defines += [ "SYSTEM_NATIVE_UTF8" ]
   }
 
   if (is_android) {
+    sources -= [
+      "process/process_unittest.cc",
+      "process/process_util_unittest.cc",
+    ]
     deps += [
       ":base_java",
       ":base_java_unittest_support",
       "//base/android/jni_generator:jni_generator_tests",
+      "//base/test:test_support_java",
     ]
   }
 
   if (is_ios) {
     sources -= [
       "files/file_locking_unittest.cc",
       "files/file_path_watcher_unittest.cc",
       "memory/discardable_shared_memory_unittest.cc",
       "memory/shared_memory_unittest.cc",
       "process/memory_unittest.cc",
@@ skipping 403 matching lines @@
 }
 
 fuzzer_test("base_json_correctness_fuzzer") {
   sources = [
     "json/correctness_fuzzer.cc",
   ]
   deps = [
     ":base",
   ]
 }