[Linux] Fix browser relaunching, which broke after enabling NO_NEW_PRIVS by default.

BUG=358713, 361943
TEST=Go to about:flags, change a flag, and click relaunch. The browser starts again.

Review URL: https://codereview.chromium.org/231843007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@263046 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/first_run/upgrade_util_linux.cc

@@ -23,7 +23,10 @@ double saved_last_modified_time_of_exe = 0;
 namespace upgrade_util {
 
 bool RelaunchChromeBrowser(const CommandLine& command_line) {
-  return base::LaunchProcess(command_line, base::LaunchOptions(), NULL);
+  base::LaunchOptions options;
+  // Don't set NO_NEW_PRIVS on the relaunched browser process.
+  options.allow_new_privs = true;
+  return base::LaunchProcess(command_line, options, NULL);
 }
 
 bool IsUpdatePendingRestart() {