Add default icon to app_host.exe, and use it in shortcuts during installation.

chrome/installer/util/chrome_app_host_distribution.h

 // 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 file extends the browser distribution with a specific implementation
 // for Chrome AppHost.
 
 #ifndef CHROME_INSTALLER_UTIL_CHROME_APP_HOST_DISTRIBUTION_H_
 #define CHROME_INSTALLER_UTIL_CHROME_APP_HOST_DISTRIBUTION_H_
 
@@ skipping 35 matching lines @@
   virtual string16 GetUninstallLinkName() OVERRIDE;
 
   virtual string16 GetUninstallRegPath() OVERRIDE;
 
   virtual string16 GetVersionKey() OVERRIDE;
 
   virtual bool CanSetAsDefault() OVERRIDE;
 
   virtual bool CanCreateDesktopShortcuts() OVERRIDE;
 
-  virtual int GetIconIndex() OVERRIDE;
+  virtual string16 GetIconFilename() OVERRIDE;
 
   virtual bool GetCommandExecuteImplClsid(
       string16* handler_class_uuid) OVERRIDE;
 
   virtual void UpdateInstallStatus(bool system_install,
       installer::ArchiveType archive_type,
       installer::InstallStatus install_status) OVERRIDE;
 
  protected:
   friend class BrowserDistribution;
 
   // Disallow construction from non-friends.
   ChromeAppHostDistribution();
 };
 
 #endif  // CHROME_INSTALLER_UTIL_CHROME_APP_HOST_DISTRIBUTION_H_