cros: Prevent shut down on lid-close during migration.

chromeos/dbus/power_policy_controller.cc

Index: chromeos/dbus/power_policy_controller.cc
diff --git a/chromeos/dbus/power_policy_controller.cc b/chromeos/dbus/power_policy_controller.cc
index 783d17fb3e636d76b77b95fa5a243f6160514e1a..0592a18fd35f9475375aacd3fe764576ca915f3f 100644
--- a/chromeos/dbus/power_policy_controller.cc
+++ b/chromeos/dbus/power_policy_controller.cc
@@ -276,12 +276,18 @@ void PowerPolicyController::NotifyChromeIsExiting() {
   SendCurrentPolicy();
 }
 
+void PowerPolicyController::SetEncryptionMigrationActive(bool active) {
+  encryption_migration_active_ = active;
+  SendCurrentPolicy();
+}
+
 PowerPolicyController::PowerPolicyController(PowerManagerClient* client)
     : client_(client),
       prefs_were_set_(false),
       honor_screen_wake_locks_(true),
       next_wake_lock_id_(1),
-      chrome_is_exiting_(false) {
+      chrome_is_exiting_(false),
+      encryption_migration_active_(false) {
   DCHECK(client_);
   client_->AddObserver(this);
 }
@@ -367,6 +373,15 @@ void PowerPolicyController::SendCurrentPolicy() {
     }
   }
 
+  if (encryption_migration_active_ &&
+      policy.lid_closed_action() !=
+          power_manager::PowerManagementPolicy_Action_DO_NOTHING) {
+    policy.set_lid_closed_action(
+        power_manager::PowerManagementPolicy_Action_SUSPEND);

[Daniel Erat, 2017/05/30 23:41:47]

just out of curiosity, are you currently seeing the system shut down when you
close the lid while the migration is in-progress? we usually shut down while at
the login screen and suspend after the user has logged in (although enterprise
policies can override this), so it'd depend on how far chrome thinks we've
gotten in the login process when the migration begins (which i'm not sure of).

[dspaid, 2017/05/30 23:46:39]

Yes, we do observe shut down on lid close for stock profiles.  We interrupt the
login process very early on, so user and enterprise policies have not yet been
applied.

+    causes +=
+        std::string((causes.empty() ? "" : ", ")) + "encryption migration";
+  }
+
   // To avoid a race in the case where the user asks Chrome to sign out
   // and then immediately closes the lid, override the lid-closed action
   // so the system will stay awake while Chrome is exiting. When Chrome