Add new BrowserForceSigninEnabeld policy option with future:true flag.

chrome/browser/policy/configuration_policy_handler_list_factory.cc

Index: chrome/browser/policy/configuration_policy_handler_list_factory.cc
diff --git a/chrome/browser/policy/configuration_policy_handler_list_factory.cc b/chrome/browser/policy/configuration_policy_handler_list_factory.cc
index a5bdd33addc3c914ef3b8749c63f3dd4729508db..d505a9f945b3eca548d2b66e44bf8604f51a0d51 100644
--- a/chrome/browser/policy/configuration_policy_handler_list_factory.cc
+++ b/chrome/browser/policy/configuration_policy_handler_list_factory.cc
@@ -365,7 +365,6 @@ const PolicyToPreferenceMapEntry kSimplePolicyMap[] = {
   { key::kComponentUpdatesEnabled,
     prefs::kComponentUpdatesEnabled,
     base::Value::TYPE_BOOLEAN },

[pastarmovj, 2016/09/14 19:56:29]

Please revert the line removal.

[zmin, 2016/09/14 20:39:44]

Done.

-
 #if defined(ENABLE_SPELLCHECK)
   { key::kSpellCheckServiceEnabled,
     spellcheck::prefs::kSpellCheckUseSpellingService,
@@ -573,6 +572,9 @@ const PolicyToPreferenceMapEntry kSimplePolicyMap[] = {
   { key::kBrowserAddPersonEnabled,
     prefs::kBrowserAddPersonEnabled,
     base::Value::TYPE_BOOLEAN },
+  { key::kBrowserForceSigninEnabled,

[pastarmovj, 2016/09/14 19:56:29]

I don't think the 'Browser' prefix is useful or rather it might make sense to
make it ForceBrowserSignin. I think you don't need the enabled suffix either.
The name already has a 'force' verb. In general I see ForceBrowserSignin as a
better name for the policy too.

PS. I think the reason the other policies here have this prefix is to
differentiate them from the same policies for ChromeOS. 

[zmin, 2016/09/14 20:39:44]

Yes, I use 'Browser' here just because of the two polices above as they are all
related to 'User Profile' but I don't know that is caused by ChromeOS. And yes,
I think ForceBrowserSignin is a good name since we have other 'Force' series as
well.

+    prefs::kBrowserForceSigninEnabled,
+    base::Value::TYPE_BOOLEAN },
 #endif  // !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
 
 #if defined(OS_WIN)