Stub for ARC print Bridge

components/arc/arc_bridge_service.cc

Index: components/arc/arc_bridge_service.cc
diff --git a/components/arc/arc_bridge_service.cc b/components/arc/arc_bridge_service.cc
index f2c990238fdd42b5ca582e04a5b679191445e2dc..51796de5020a4a8410701f9b1aecf527d3ff5480 100644
--- a/components/arc/arc_bridge_service.cc
+++ b/components/arc/arc_bridge_service.cc
@@ -85,6 +85,8 @@ void ArcBridgeService::AddObserver(Observer* observer) {
     observer->OnPolicyInstanceReady();
   if (power_instance())
     observer->OnPowerInstanceReady();
+  if (print_instance())
+    observer->OnPrintInstanceReady();
   if (process_instance())
     observer->OnProcessInstanceReady();
   if (storage_manager_instance())
@@ -478,6 +480,30 @@ void ArcBridgeService::ClosePowerChannel() {
   FOR_EACH_OBSERVER(Observer, observer_list(), OnPowerInstanceClosed());
 }
 
+void ArcBridgeService::OnPrintInstanceReady(mojom::PrintInstancePtr print_ptr) {
+  DCHECK(CalledOnValidThread());
+  temporary_print_ptr_ = std::move(print_ptr);
+  temporary_print_ptr_.QueryVersion(base::Bind(
+      &ArcBridgeService::OnPrintVersionReady, weak_factory_.GetWeakPtr()));
+}
+
+void ArcBridgeService::OnPrintVersionReady(uint32_t version) {
+  DCHECK(CalledOnValidThread());
+  print_ptr_ = std::move(temporary_print_ptr_);
+  print_ptr_.set_connection_error_handler(base::Bind(
+      &ArcBridgeService::ClosePrintChannel, weak_factory_.GetWeakPtr()));
+  FOR_EACH_OBSERVER(Observer, observer_list(), OnPrintInstanceReady());
+}
+
+void ArcBridgeService::ClosePrintChannel() {
+  DCHECK(CalledOnValidThread());
+  if (!print_ptr_)
+    return;
+
+  print_ptr_.reset();
+  FOR_EACH_OBSERVER(Observer, observer_list(), OnPrintInstanceClosed());
+}
+
 void ArcBridgeService::OnProcessInstanceReady(
     mojom::ProcessInstancePtr process_ptr) {
   DCHECK(CalledOnValidThread());
@@ -624,6 +650,7 @@ void ArcBridgeService::CloseAllChannels() {
   CloseObbMounterChannel();
   ClosePolicyChannel();
   ClosePowerChannel();
+  ClosePrintChannel();
   CloseProcessChannel();
   CloseStorageManagerChannel();
   CloseVideoChannel();