[Mac] Add option to reauthenticate the OS user before revealing passwords.

chrome/common/chrome_switches.h

Index: chrome/common/chrome_switches.h
diff --git a/chrome/common/chrome_switches.h b/chrome/common/chrome_switches.h
index 63cd922fad1f4795746704326ac3efd84f946734..8726f1f7630e67f204cf2f6fe48510064838aec8 100644
--- a/chrome/common/chrome_switches.h
+++ b/chrome/common/chrome_switches.h
@@ -118,6 +118,7 @@ extern const char kDisableMinimizeOnSecondLauncherItemClick[];
 extern const char kDisableNTPOtherSessionsMenu[];
 extern const char kDisableOmniboxAutoCompletionForIme[];
 extern const char kDisablePasswordAutofillPublicSuffixDomainMatching[];
+extern const char kDisablePasswordManagerReauthentication[];
 extern const char kDisablePnacl[];
 extern const char kDisablePnaclCrashThrottling[];
 extern const char kDisablePnaclInstall[];
@@ -199,6 +200,7 @@ extern const char kEnableNpnHttpOnly[];
 extern const char kEnableOmniboxAutoCompletionForIme[];
 extern const char kEnablePanels[];
 extern const char kEnablePasswordAutofillPublicSuffixDomainMatching[];
+extern const char kEnablePasswordManagerReauthentication[];
 extern const char kEnablePeopleSearch[];
 extern const char kEnableProfiling[];
 extern const char kEnableQuic[];