Call session_manager's EmitArcBooted() D-Bus method when ARC is ready

chromeos/dbus/session_manager_client.cc

Index: chromeos/dbus/session_manager_client.cc
diff --git a/chromeos/dbus/session_manager_client.cc b/chromeos/dbus/session_manager_client.cc
index 96807ba96eb2914407ad37f6fb2c5f38cee4aa6f..b8b24739716f9cf1c2f53d79d9860edbbcbe4499 100644
--- a/chromeos/dbus/session_manager_client.cc
+++ b/chromeos/dbus/session_manager_client.cc
@@ -344,6 +344,11 @@ class SessionManagerClientImpl : public SessionManagerClient {
                    callback));
   }
 
+  void EmitArcBooted() override {
+    SimpleMethodCallToSessionManager(
+        login_manager::kSessionManagerEmitArcBooted);
+  }
+
   void GetArcStartTime(const GetArcStartTimeCallback& callback) override {
     dbus::MethodCall method_call(
         login_manager::kSessionManagerInterface,
@@ -898,6 +903,8 @@ class SessionManagerClientStubImpl : public SessionManagerClient {
     callback.Run(false);
   }
 
+  void EmitArcBooted() override {}
+
   void StopArcInstance(const ArcCallback& callback) override {
     callback.Run(false);
   }