Support automatic javascript test registry in gtest when creating WebUI tests.

chrome/test/out_of_proc_test_runner.h

+// Copyright (c) 2011 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 CHROME_TEST_OUT_OF_PROC_TEST_RUNNER_H_
+#define CHROME_TEST_OUT_OF_PROC_TEST_RUNNER_H_
+#pragma once
+
+#include "base/basictypes.h"
+
+namespace test {
+
+// Interface to register tests at runtime. The motivation for this is to provide
+// a mechanism to register callbacks at linker initialization time to cause test
+// registration at runtime.
+class RegisterTestCallback {
+ public:
+  RegisterTestCallback();
+  virtual void RegisterTest() const = 0;
+
+ protected:
+  friend void CallRegisterTestCallbacksAndClear();
+  virtual ~RegisterTestCallback();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(RegisterTestCallback);
+};
+
+// Every |callback| added with this function call will be called early enough in
+// out_of_proc_test_runner's main to register tests at runtime. |callback| is
+// owned by out_of_proc_test_runner, which will free it after calling it.
+void AddRegisterTestCallback(RegisterTestCallback* callback);
+
+}  // namespace test
+
+#endif  // CHROME_TEST_OUT_OF_PROC_TEST_RUNNER_H_