arc: Implement silent OptIn mode for managed Arc.

chrome/browser/chromeos/arc/arc_support_host.cc

Index: chrome/browser/chromeos/arc/arc_support_host.cc
diff --git a/chrome/browser/chromeos/arc/arc_support_host.cc b/chrome/browser/chromeos/arc/arc_support_host.cc
index 3713eb058dab9ea26329320fbb9e032a40d6dcb9..25b0e0ba29ae48835e3c7be85152319e39956074 100644
--- a/chrome/browser/chromeos/arc/arc_support_host.cc
+++ b/chrome/browser/chromeos/arc/arc_support_host.cc
@@ -28,12 +28,14 @@
 
 namespace {
 const char kAction[] = "action";
-const char kCode[] = "code";
 const char kCanEnable[] = "canEnable";
-const char kStatus[] = "status";
+const char kCode[] = "code";
+const char kCountryCode[] = "countryCode";
 const char kData[] = "data";
 const char kDeviceId[] = "deviceId";
 const char kOn[] = "on";
+const char kSilentMode[] = "silentMode";
+const char kStatus[] = "status";
 const char kPage[] = "page";
 const char kText[] = "text";
 const char kActionInitialize[] = "initialize";
@@ -136,7 +138,7 @@ void ArcSupportHost::Initialize() {
 
   const std::string& app_locale = g_browser_process->GetApplicationLocale();
   const std::string& country_code = base::CountryCodeForCurrentTimezone();
-  localized_strings->SetString("countryCode", country_code);
+  localized_strings->SetString(kCountryCode, country_code);
 
   webui::SetLoadTimeDataDefaults(app_locale, localized_strings.get());
 
@@ -151,6 +153,8 @@ void ArcSupportHost::Initialize() {
   request.SetString(kAction, kActionInitialize);
   request.Set(kData, std::move(localized_strings));
   request.SetString(kDeviceId, device_id);
+  request.SetBoolean(kSilentMode, arc_auth_service->IsArcManaged());
+
   base::JSONWriter::Write(request, &request_string);
   client_->PostMessageFromNativeHost(request_string);
 }