Add ArcEnabled policy implementation

chrome/browser/ui/webui/options/browser_options_handler.cc

Index: chrome/browser/ui/webui/options/browser_options_handler.cc
diff --git a/chrome/browser/ui/webui/options/browser_options_handler.cc b/chrome/browser/ui/webui/options/browser_options_handler.cc
index a9045fff5b0b8ab7fbd54011913c56e0dbdfe3bf..aefd4d9474ab096418e67ad04a7801b0b0abd9f7 100644
--- a/chrome/browser/ui/webui/options/browser_options_handler.cc
+++ b/chrome/browser/ui/webui/options/browser_options_handler.cc
@@ -1048,7 +1048,9 @@ void BrowserOptionsHandler::InitializePage() {
     consumer_management->AddObserver(this);
   }
 
-  if (!arc::ArcBridgeService::GetEnabled(
+  if (policy::ProfilePolicyConnectorFactory::GetForBrowserContext(profile)

[Thiemo Nagel, 2016/02/12 17:32:08]

Wouldn't that hide the ARC checkbox for all managed users?  Also, in case ARC is
disabled by policy, we want to grey out the checkbox (not hide it).

[Polina Bondarenko, 2016/02/12 17:45:00]

Do you mean that if ARC is enabled by policy, then user can use this checkbox? I
thought that if ARC is enabled, it should be enabled without asking user.

[Thiemo Nagel, 2016/02/12 17:53:32]

Yes, sure.  But in that case the checkbox shouldn't be hidden, it should just be
greyed out (and a management icon added to it).  That's what we do whenever a
policy overrides a setting.

+          ->IsManaged() ||
+      !arc::ArcBridgeService::GetEnabled(
           base::CommandLine::ForCurrentProcess()) ||
       arc::ArcAuthService::IsOptInVerificationDisabled()) {
     web_ui()->CallJavascriptFunction("BrowserOptions.hideAndroidAppsSection");