android: Java-based launcher thread

base/test/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.
 
 import("//build/config/ui.gni")
 import("//build/config/nacl/config.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
@@ skipping 311 matching lines @@
       "//base",
       "//build/config/sanitizers:deps",
     ]
   }
 }
 
 if (is_android) {
   generate_jni("base_unittests_jni_headers") {
     sources = [
       "android/java/src/org/chromium/base/ContentUriTestUtils.java",
+      "android/java/src/org/chromium/base/JavaHandlerThreadTest.java",
       "android/java/src/org/chromium/base/TestSystemMessageHandler.java",
       "android/java/src/org/chromium/base/TestUiThread.java",
     ]
     jni_package = "base"
   }
 
   generate_jni("test_support_jni_headers") {
     sources = [
       "android/java/src/org/chromium/base/MainReturnCodeResult.java",
       "android/java/src/org/chromium/base/MultiprocessTestClientLauncher.java",
@@ skipping 26 matching lines @@
     testonly = true
     import_include = [
       "android/java/src",
       "//base/android/java/src",
     ]
     sources = [
       "android/java/src/org/chromium/base/ITestClient.aidl",
     ]
   }
 }