GTTF: Extract a function to launch child gtest process.

base/test/test_launcher.h

 // Copyright 2013 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_TEST_LAUNCHER_H_
 #define BASE_TEST_TEST_LAUNCHER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/time.h"
 
+class CommandLine;
+
 namespace testing {
 class TestCase;
 class TestInfo;
 }
 
 namespace base {
 
 // Constants for GTest command-line flags.
 extern const char kGTestFilterFlag[];
 extern const char kGTestListTestsFlag[];
@@ skipping 38 matching lines @@
 
   // If the delegate is running tests asynchronously, it must finish
   // running all pending tests and call their callbacks before returning
   // from this method.
   virtual void RunRemainingTests() = 0;
 
  protected:
   virtual ~TestLauncherDelegate();
 };
 
+int LaunchChildGTestProcess(const CommandLine& command_line,
+                            base::TimeDelta timeout,
+                            bool* was_timeout);
+
 // Launches GTest-based tests from the current executable
 // using |launcher_delegate|.
 int LaunchTests(TestLauncherDelegate* launcher_delegate,
                 int argc,
                 char** argv) WARN_UNUSED_RESULT;
 
 }  // namespace base
 
 #endif  // BASE_TEST_TEST_LAUNCHER_H_