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

testing/android/native_test/main_runner.h

Index: testing/android/native_test/main_runner.h
diff --git a/testing/android/native_test/main_runner.h b/testing/android/native_test/main_runner.h
new file mode 100644
index 0000000000000000000000000000000000000000..acd499b3956155a76fa6461f672cbf4a2082cfc6
--- /dev/null
+++ b/testing/android/native_test/main_runner.h
@@ -0,0 +1,18 @@
+// 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 TESTING_ANDROID_NATIVE_TEST_MAIN_RUNNER_H_
+#define TESTING_ANDROID_NATIVE_TEST_MAIN_RUNNER_H_
+
+#include <jni.h>
+
+namespace testing {
+namespace android {
+
+bool RegisterMainRunnerJni(JNIEnv* env);
+
+}  // namespace android
+}  // namespace testing
+
+#endif  // TESTING_ANDROID_NATIVE_TEST_MAIN_RUNNER_H_