Improve process launch handle sharing API.

components/browser_watcher/watcher_client_win.cc

Index: components/browser_watcher/watcher_client_win.cc
diff --git a/components/browser_watcher/watcher_client_win.cc b/components/browser_watcher/watcher_client_win.cc
index 179480e8ed9d2d5879831133926f6948e3ab2e98..b236d5c0a7c0aa3efc5565beeb1abd16dc9f0ce0 100644
--- a/components/browser_watcher/watcher_client_win.cc
+++ b/components/browser_watcher/watcher_client_win.cc
@@ -38,13 +38,14 @@ void WatcherClient::LaunchWatcher() {
   DCHECK(self.IsValid());
   base::CommandLine cmd_line(command_line_generator_.Run(self.Handle()));
 
-  base::HandlesToInheritVector to_inherit;
   base::LaunchOptions options;
   options.start_hidden = true;
-  to_inherit.push_back(self.Handle());
-  to_inherit.insert(to_inherit.end(), inherited_handles_.begin(),
-                    inherited_handles_.end());
-  options.handles_to_inherit = &to_inherit;
+
+  // Launch the child process inheriting only |self|.
+  options.handles_to_inherit.push_back(self.Handle());
+  options.handles_to_inherit.insert(options.handles_to_inherit.end(),
+                                    inherited_handles_.begin(),
+                                    inherited_handles_.end());
 
   process_ = base::LaunchProcess(cmd_line, options);
   if (!process_.IsValid())