Added single instance policy

src/NzbDrone.Host/ApplicationServer.cs

@@ -1,8 +1,6 @@
-using System;
-using System.ServiceProcess;
+using System.ServiceProcess;
 using NLog;
 using NzbDrone.Common.EnvironmentInfo;
-using NzbDrone.Common.Processes;
 using NzbDrone.Core.Configuration;
 using NzbDrone.Host.Owin;
 
@@ -20,20 +18,20 @@ namespace NzbDrone.Host
         private readonly IConfigFileProvider _configFileProvider;
         private readonly IRuntimeInfo _runtimeInfo;
         private readonly IHostController _hostController;
-        private readonly IProcessProvider _processProvider;
         private readonly PriorityMonitor _priorityMonitor;
         private readonly IStartupArguments _startupArguments;
+        private readonly IBrowserService _browserService;
         private readonly Logger _logger;
 
-        public NzbDroneServiceFactory(IConfigFileProvider configFileProvider, IHostController hostController, IRuntimeInfo runtimeInfo,
-                           IProcessProvider processProvider, PriorityMonitor priorityMonitor, IStartupArguments startupArguments, Logger logger)
+        public NzbDroneServiceFactory(IConfigFileProvider configFileProvider, IHostController hostController, 
+            IRuntimeInfo runtimeInfo, PriorityMonitor priorityMonitor, IStartupArguments startupArguments, IBrowserService browserService, Logger logger)
         {
             _configFileProvider = configFileProvider;
             _hostController = hostController;
             _runtimeInfo = runtimeInfo;
-            _processProvider = processProvider;
             _priorityMonitor = priorityMonitor;
             _startupArguments = startupArguments;
+            _browserService = browserService;
             _logger = logger;
         }
 
@@ -50,15 +48,7 @@ namespace NzbDrone.Host
                 _runtimeInfo.IsUserInteractive &&
                 _configFileProvider.LaunchBrowser)
             {
-                try
-                {
-                    _logger.Info("Starting default browser. {0}", _hostController.AppUrl);
-                    _processProvider.OpenDefaultBrowser(_hostController.AppUrl);
-                }
-                catch (Exception e)
-                {
-                    _logger.ErrorException("Failed to open URL in default browser.", e);
-                }
+                _browserService.LaunchWebUI();
             }
 
             _priorityMonitor.Start();