Upgrade the windows specific version of LaunchProcess to avoid raw handles.

base/process/launch_win.cc

Index: base/process/launch_win.cc
diff --git a/base/process/launch_win.cc b/base/process/launch_win.cc
index a3303a5e08588669aac9d84cf6f9acdb2473b594..323cfcbf66b2f53f96dffb916fa94807f262d392 100644
--- a/base/process/launch_win.cc
+++ b/base/process/launch_win.cc
@@ -232,6 +232,17 @@ bool LaunchProcess(const string16& cmdline,
   return true;
 }
 
+// TODO(rvargas) crbug.com/416721: Remove this stub after LaunchProcess is
+// fully migrated to use Process.
+Process LaunchProcess(const string16& cmdline,
+                      const LaunchOptions& options) {
+  win::ScopedHandle process_handle;
+  if (LaunchProcess(cmdline, options, &process_handle))
+    return Process(process_handle.Take());
+
+  return Process();
+}
+
 bool LaunchProcess(const CommandLine& cmdline,
                    const LaunchOptions& options,
                    ProcessHandle* process_handle) {