Multiprocess test client: Android child process launcher rework.

base/test/android/android_main_function_thunk.h

+// Copyright 2016 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_ANDROID_MAIN_FUNCTION_THUNK_H_
+#define BASE_TEST_ANDROID_MAIN_FUNCTION_THUNK_H_
+
+namespace base {
+namespace android {
+
+// This struct provides a way for multiprocess tests to specify the main
+// function that should be executed by the child process.
+
+struct AndroidMainFunctionThunk {
+  typedef int (*MainFuntion)(int, char**);
+  explicit AndroidMainFunctionThunk(MainFuntion main_function);
+};
+
+}  // namespace android
+}  // namespace base
+
+#endif  // BASE_TEST_ANDROID_MAIN_FUNCTION_THUNK_H_