Adding a new annotation to set ChildProcessAllocator settings in tests.

content/public/test/android/javatests/src/org/chromium/content/browser/test/ChildProcessAllocatorSettings.java

+// Copyright 2017 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.
+
+package org.chromium.content.browser.test;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/** An annotation used in test to hard-code some of the ChildProcessAllocator settings */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface ChildProcessAllocatorSettings {
+    int sandboxedServiceCount() default -1;
+    String sandboxedServiceName() default "";
+}