Add OBB mounter Mojo interface

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 4f59b16dd674c4206d21af656213b968a88706e9..c469fbf4c1099d16fda078d1f8173b0462d18ffc 100644
--- a/components/arc/arc_bridge_service.cc
+++ b/components/arc/arc_bridge_service.cc
@@ -88,6 +88,8 @@ void ArcBridgeService::AddObserver(Observer* observer) {
     observer->OnVideoInstanceReady();
   if (window_manager_instance())
     observer->OnWindowManagerInstanceReady();
+  if (obb_mounter_instance())
+    observer->OnObbMounterInstanceReady();
 }
 
 void ArcBridgeService::RemoveObserver(Observer* observer) {
@@ -494,6 +496,32 @@ void ArcBridgeService::CloseWindowManagerChannel() {
   FOR_EACH_OBSERVER(Observer, observer_list(), OnWindowManagerInstanceClosed());
 }
 
+void ArcBridgeService::OnObbMounterInstanceReady(
+    mojom::ObbMounterInstancePtr obb_mounter_ptr) {
+  DCHECK(CalledOnValidThread());
+  temporary_obb_mounter_ptr_ = std::move(obb_mounter_ptr);
+  temporary_obb_mounter_ptr_.QueryVersion(base::Bind(
+      &ArcBridgeService::OnObbMounterVersionReady,
+      weak_factory_.GetWeakPtr()));
+}
+
+void ArcBridgeService::OnObbMounterVersionReady(int32_t version) {
+  DCHECK(CalledOnValidThread());
+  obb_mounter_ptr_ = std::move(temporary_obb_mounter_ptr_);
+  obb_mounter_ptr_.set_connection_error_handler(base::Bind(
+      &ArcBridgeService::CloseObbMounterChannel,
+      weak_factory_.GetWeakPtr()));
+  FOR_EACH_OBSERVER(Observer, observer_list(), OnObbMounterInstanceReady());
+}
+
+void ArcBridgeService::CloseObbMounterChannel() {
+  if (!obb_mounter_ptr_)
+    return;
+
+  obb_mounter_ptr_.reset();
+  FOR_EACH_OBSERVER(Observer, observer_list(), OnObbMounterInstanceClosed());
+}
+
 void ArcBridgeService::SetState(State state) {
   DCHECK(CalledOnValidThread());
   // DCHECK on enum classes not supported.
@@ -533,6 +561,7 @@ void ArcBridgeService::CloseAllChannels() {
   CloseProcessChannel();
   CloseVideoChannel();
   CloseWindowManagerChannel();
+  CloseObbMounterChannel();
 }
 
 }  // namespace arc