Clean up users of a deprecated base::LaunchApp API.

chrome/browser/importer/firefox_importer_unittest_utils_mac.cc

Index: chrome/browser/importer/firefox_importer_unittest_utils_mac.cc
diff --git a/chrome/browser/importer/firefox_importer_unittest_utils_mac.cc b/chrome/browser/importer/firefox_importer_unittest_utils_mac.cc
index dbaf19a788d74f49f05ec4c29bfd9974aba1b68d..b28a7384c4dffcab3e6dbd93e5763e85aee0a601 100644
--- a/chrome/browser/importer/firefox_importer_unittest_utils_mac.cc
+++ b/chrome/browser/importer/firefox_importer_unittest_utils_mac.cc
@@ -53,7 +53,12 @@ bool LaunchNSSDecrypterChildProcess(const FilePath& nss_path,
 
   bool debug_on_start = CommandLine::ForCurrentProcess()->HasSwitch(
                             switches::kDebugChildren);
-  return base::LaunchApp(cl.argv(), env, fds_to_map, debug_on_start, handle);
+  base::LaunchOptions options;
+  options.environ = &env;
+  options.fds_to_remap = &fds_to_map;
+  options.wait = debug_on_start;
+  options.process_handle = handle;
+  return base::LaunchProcess(cl.argv(), options);
 }
 
 }  // namespace