Adding a new annotation to set ChildProcessAllocator settings in tests.

content/public/test/android/javatests/src/org/chromium/content/browser/test/ContentInstrumentationTestRunner.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 org.chromium.base.test.BaseChromiumInstrumentationTestRunner;
+import org.chromium.base.test.BaseTestResult;
+
+/**
+ * An instrumentation test runner similar to BaseInstrumentationTestRunner but which also registers
+ * content specific annotations.
+ */
+public class ContentInstrumentationTestRunner extends BaseChromiumInstrumentationTestRunner {
+    @Override
+    protected void addTestHooks(BaseTestResult result) {
+        super.addTestHooks(result);
+        result.addPreTestHook(new ChildProcessAllocatorSettingsHook());
+    }
+}