Change IPC to make sense.

osu.Desktop/Program.cs

@@ -29,7 +29,7 @@ namespace osu.Desktop
             {
                 if (!host.IsPrimaryInstance)
                 {
-                    var importer = new BeatmapImporter(host);
+                    var importer = new BeatmapIPCChannel(host);
                     // Restore the cwd so relative paths given at the command line work correctly
                     Directory.SetCurrentDirectory(cwd);
                     foreach (var file in args)

osu.Game.Tests/Beatmaps/IO/ImportBeatmapTest.cs

@@ -69,7 +69,7 @@ namespace osu.Game.Tests.Beatmaps.IO
 
                 Assert.IsTrue(File.Exists(temp));
 
-                var importer = new BeatmapImporter(client);
+                var importer = new BeatmapIPCChannel(client);
                 if (!importer.ImportAsync(temp).Wait(1000))
                     Assert.Fail(@"IPC took too long to send");
 

osu.Game/Database/BeatmapDatabase.cs

@@ -25,14 +25,14 @@ namespace osu.Game.Database
         public event Action<BeatmapSetInfo> BeatmapSetAdded;
         public event Action<BeatmapSetInfo> BeatmapSetRemoved;
 
-        private BeatmapImporter ipc;
+        private BeatmapIPCChannel ipc;
 
-        public BeatmapDatabase(Storage storage, GameHost importHost = null)
+        public BeatmapDatabase(Storage storage, IIpcHost importHost = null)
         {
             this.storage = storage;
 
             if (importHost != null)
-                ipc = new BeatmapImporter(importHost, this);
+                ipc = new BeatmapIPCChannel(importHost, this);
 
             if (connection == null)
             {

osu.Game/IPC/BeatmapIPCChannel.cs

@@ -0,0 +1,43 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System.Diagnostics;
+using System.Threading.Tasks;
+using osu.Framework.Platform;
+using osu.Game.Database;
+
+namespace osu.Game.IPC
+{
+    public class BeatmapIPCChannel : IpcChannel<BeatmapImportMessage>
+    {
+        private BeatmapDatabase beatmaps;
+
+        public BeatmapIPCChannel(IIpcHost host, BeatmapDatabase beatmaps = null)
+            : base(host)
+        {
+            this.beatmaps = beatmaps;
+            MessageReceived += (msg) =>
+            {
+                Debug.Assert(beatmaps != null);
+                ImportAsync(msg.Path);
+            };
+        }
+
+        public async Task ImportAsync(string path)
+        {
+            if (beatmaps == null)
+            {
+                //we want to contact a remote osu! to handle the import.
+                await SendMessageAsync(new BeatmapImportMessage { Path = path });
+                return;
+            }
+
+            beatmaps.Import(path);
+        }
+    }
+
+    public class BeatmapImportMessage
+    {
+        public string Path;
+    }
+}

osu.Game/IPC/BeatmapImporter.cs

@@ -1,46 +0,0 @@
-// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
-// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
-
-using System.Diagnostics;
-using System.Threading.Tasks;
-using osu.Framework.Platform;
-using osu.Game.Database;
-
-namespace osu.Game.IPC
-{
-    public class BeatmapImporter
-    {
-        private IpcChannel<BeatmapImportMessage> channel;
-        private BeatmapDatabase beatmaps;
-
-        public BeatmapImporter(GameHost host,  BeatmapDatabase beatmaps = null)
-        {
-            this.beatmaps = beatmaps;
-
-            channel = new IpcChannel<BeatmapImportMessage>(host);
-            channel.MessageReceived += messageReceived;
-        }
-
-        public async Task ImportAsync(string path)
-        {
-            if (beatmaps != null)
-                beatmaps.Import(path);
-            else
-            {
-                await channel.SendMessageAsync(new BeatmapImportMessage { Path = path });
-            }
-        }
-
-        private void messageReceived(BeatmapImportMessage msg)
-        {
-            Debug.Assert(beatmaps != null);
-
-            ImportAsync(msg.Path);
-        }
-    }
-
-    public class BeatmapImportMessage
-    {
-        public string Path;
-    }
-}

osu.Game/osu.Game.csproj

@@ -190,7 +190,7 @@
     <Compile Include="Graphics\UserInterface\PercentageCounter.cs" />
     <Compile Include="Graphics\UserInterface\ScoreCounter.cs" />
     <Compile Include="Graphics\UserInterface\StarCounter.cs" />
-    <Compile Include="IPC\BeatmapImporter.cs" />
+    <Compile Include="IPC\BeatmapIPCChannel.cs" />
     <Compile Include="Online\API\APIAccess.cs" />
     <Compile Include="Online\API\APIRequest.cs" />
     <Compile Include="Online\API\OAuth.cs" />