Disable ACTION_BOOT_COMPLETED event for 3rd party apps.

components/arc/arc_bridge_bootstrap.cc

Index: components/arc/arc_bridge_bootstrap.cc
diff --git a/components/arc/arc_bridge_bootstrap.cc b/components/arc/arc_bridge_bootstrap.cc
index e06fdb1a704a472fe8458b50a929d578db22bcf0..e9d06eafb04d8bfb569016bcc0acd5c6f7caa58f 100644
--- a/components/arc/arc_bridge_bootstrap.cc
+++ b/components/arc/arc_bridge_bootstrap.cc
@@ -25,6 +25,7 @@
 #include "chromeos/dbus/dbus_method_call_status.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/session_manager_client.h"
+#include "components/arc/arc_features.h"
 #include "components/user_manager/user_manager.h"
 #include "ipc/unix_domain_socket_util.h"
 #include "mojo/edk/embedder/embedder.h"
@@ -296,10 +297,15 @@ void ArcBridgeBootstrapImpl::OnSocketCreated(base::ScopedFD socket_fd) {
   const cryptohome::Identification cryptohome_id(
       user_manager->GetPrimaryUser()->GetAccountId());
 
+  // Read the arc-boot-completed-broadcast flag
+  bool disable_arc_boot_completed_broadcast =
+      !base::FeatureList::IsEnabled(features::kArcBootCompletedBroadcast);
+
   chromeos::SessionManagerClient* session_manager_client =
       chromeos::DBusThreadManager::Get()->GetSessionManagerClient();
   session_manager_client->StartArcInstance(
       cryptohome_id,
+      disable_arc_boot_completed_broadcast,
       base::Bind(&ArcBridgeBootstrapImpl::OnInstanceStarted,
                  weak_factory_.GetWeakPtr(), base::Passed(&socket_fd)));
 }