Fix handling of BROWSER_WRAPPER in the test launcher.

base/test/test_launcher.h

Index: base/test/test_launcher.h
diff --git a/base/test/test_launcher.h b/base/test/test_launcher.h
index 603179c1f0035da0ac515a3ec900859f1a801aa3..30d2829c535fe85e31611d6ef7be199e9dad5cb2 100644
--- a/base/test/test_launcher.h
+++ b/base/test/test_launcher.h
@@ -72,7 +72,12 @@ class TestLauncherDelegate {
   virtual ~TestLauncherDelegate();
 };
 
+// Launches a child process (assumed to be gtest-based binary)
+// using |command_line|. If |wrapper| is not empty, it is prepended
+// to the final command line. If the child process is still running
+// after |timeout|, it is terminated and |*was_timeout| is set to true.
 int LaunchChildGTestProcess(const CommandLine& command_line,
+                            const std::string& wrapper,
                             base::TimeDelta timeout,
                             bool* was_timeout);