[VS Addin] Fix several issues with debugging PPAPI plugins

visual_studio/NativeClientVSAddIn/InstallerResources/examples/hello_nacl_cpp/hello_nacl_cpp/hello_nacl_cpp.cc

 /* 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.
  */
 
 // This project demonstrates how to migrate a Windows desktop app to Native
 // Client, running first as a Win32 application (define STEP1), then as a PPAPI
 // plugin (define STEP2 through STEP6), and finally as a Native Client module.
 
 // Start with STEP1 defined and the defines for STEP2 through STEP6 commented
@@ skipping 47 matching lines @@
 // *** RUN YOUR MODULE IN THE WILD ***
 // You can run your nexe outside of Visual Studio, directly from Chrome by
 // following these steps:
 // - Build STEP6 and verify the file
 //   <project directory>/newlib/hello_nacl_plus/hello_nacl_plus.nexe exists
 // - Copy the folder <project directory>/hello_nacl_plus into your NaCl SDK's
 //   example directory.
 // - Go to the NaCl SDK directory and launch the httpd.py server.
 // - Launch Chrome, go to about:flags and enable the Native Client flag and
 //   relaunch Chrome
-// - Point Chrome at localhost:5103/hello_nacl_plus
+// - Point Chrome at http://localhost:5103/hello_nacl_plus
 
 #ifdef STEP6
 // remove Windows-dependent code.
 #undef STEP1
 #undef STEP3
 #undef STEP4
 #define NULL 0
 #else
 // includes for Windows APIs.
 #include <windows.h>
@@ skipping 276 matching lines @@
 #endif
 
 #ifdef STEP5
 // Pass the text to the browser page, there is no separate app window anymore.
 // The text is added as a new element to the page, it does not appear in the
 // module's embed view.
 void InitInstanceInBrowserWindow() {
   myInstance->PostMessage(pp::Var("Hello, Native Client!"));
 }
 #endif