[VS Addin] Fix error handling on webserver startup error

visual_studio/NativeClientVSAddIn/NativeClientVSAddIn/WebServer.cs

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 namespace NativeClientVSAddIn
 {
   using System;
   using System.IO;
   using EnvDTE;
   using Microsoft.VisualStudio.VCProjectEngine;
@@ skipping 49 matching lines @@
       {
         webServerPort = DefaultWebServerPort;
       }
 
       string webServerExecutable = "python.exe";
       string httpd = Path.Combine(properties.SDKRootDirectory, "examples", "httpd.py");
       if (!File.Exists(httpd))
           httpd = Path.Combine(properties.SDKRootDirectory, "tools", "httpd.py");
       string webServerArguments = httpd + " --no_dir_check " + webServerPort;
 
+      webServerOutputPane_.Clear();
+      webServerOutputPane_.OutputString(Strings.WebServerStartMessage + "\n");
+      webServerOutputPane_.Activate();
+
       // Start the web server process.
       try
       {
         webServer_ = new System.Diagnostics.Process();
         webServer_.StartInfo.CreateNoWindow = true;
         webServer_.StartInfo.UseShellExecute = false;
         webServer_.StartInfo.RedirectStandardOutput = true;
         webServer_.StartInfo.RedirectStandardError = true;
         webServer_.StartInfo.FileName = webServerExecutable;
         webServer_.StartInfo.Arguments = webServerArguments;
         webServer_.StartInfo.WorkingDirectory = properties.ProjectDirectory;
         webServer_.OutputDataReceived += WebServerMessageReceive;
         webServer_.ErrorDataReceived += WebServerMessageReceive;
         webServer_.Start();
         webServer_.BeginOutputReadLine();
         webServer_.BeginErrorReadLine();
       }
       catch (Exception e)
       {
         webServerOutputPane_.OutputString(Strings.WebServerStartFail + "\n");
         webServerOutputPane_.OutputString("Exception: " + e.Message + "\n");
-        webServerOutputPane_.Activate();
       }
-
-      webServerOutputPane_.Clear();
-      webServerOutputPane_.OutputString(Strings.WebServerStartMessage + "\n");
-      webServerOutputPane_.Activate();
     }
 
     /// <summary>
     /// Finalizer. Should clean up unmanaged resources. Should not be overriden in derived classes.
     /// </summary>
     ~WebServer()
     {
       Dispose(false);
     }
 
@@ skipping 28 matching lines @@
     /// Receives output from the web server process to display in the Visual Studio UI.
     /// </summary>
     /// <param name="sender">The parameter is not used.</param>
     /// <param name="e">Contains the data to display.</param>
     private void WebServerMessageReceive(object sender, System.Diagnostics.DataReceivedEventArgs e)
     {
       webServerOutputPane_.OutputString(e.Data + "\n");
     }
   }
 }