MultiProcessTest: Update SpawnChild* to return a Process.

components/browser_watcher/exit_code_watcher_win_unittest.cc

Index: components/browser_watcher/exit_code_watcher_win_unittest.cc
diff --git a/components/browser_watcher/exit_code_watcher_win_unittest.cc b/components/browser_watcher/exit_code_watcher_win_unittest.cc
index b2267006908f608d8b9f1824ce3e7a50f7bbd7c8..8b227c2db96ba04e3981cdf3a69b28a8ca589ac8 100644
--- a/components/browser_watcher/exit_code_watcher_win_unittest.cc
+++ b/components/browser_watcher/exit_code_watcher_win_unittest.cc
@@ -50,8 +50,7 @@ class ScopedSleeperProcess {
     base::CommandLine cmd_line(base::GetMultiProcessTestChildBaseCommandLine());
     base::LaunchOptions options;
     options.start_hidden = true;
-    process_ = base::Process(
-        base::SpawnMultiProcessTestChild("Sleeper", cmd_line, options));
+    process_ = base::SpawnMultiProcessTestChild("Sleeper", cmd_line, options);
     ASSERT_TRUE(process_.IsValid());
   }