Update from https://crrev.com/333737

base/test/test_ui_thread_android.h

+// 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.
+
+#ifndef BASE_TEST_TEST_UI_THREAD_ANDROID_
+#define BASE_TEST_TEST_UI_THREAD_ANDROID_
+
+#include <jni.h>
+
+namespace base {
+
+// Set up a thread as the Chromium UI Thread, and run its looper. This is is
+// intended for C++ unit tests (e.g. the net unit tests) that don't run with the
+// UI thread as their main looper, but test code that, on Android, uses UI
+// thread events, so need a running UI thread.
+void StartTestUiThreadLooper();
+
+bool RegisterTestUiThreadAndroid(JNIEnv* env);
+}  // namespace base
+
+#endif  //  BASE_TEST_TEST_UI_THREAD_ANDROID_