Add a switch to prevent logging redirection on chromeos.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 5367d52e5be8ebd2d6bb7411e427510223b551f4..45b08d8f1168b9620f6960f8a5b1f278206c78a6 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -940,6 +940,9 @@ const char kWebApkServerUrl[] = "webapk-server-url";
 // Custom crosh command.
 const char kCroshCommand[] = "crosh-command";
 
+// Disables logging redirect for testing.
+const char kDisableLoggingRedirect[] = "disable-logging-redirect";
+
 // Disables apps on the login screen. By default, they are allowed and can be
 // installed through policy.
 const char kDisableLoginScreenApps[] = "disable-login-screen-apps";