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

chrome/browser/shell_integration.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.
 
 #ifndef CHROME_BROWSER_SHELL_INTEGRATION_H_
 #define CHROME_BROWSER_SHELL_INTEGRATION_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 128 matching lines @@
   static string16 GetAppModelIdForProfile(const string16& app_name,
                                           const FilePath& profile_path);
 
   // Generates an application user model ID (AppUserModelId) for Chromium by
   // calling GetAppModelIdForProfile() with ShellUtil::GetAppId() as app_name.
   static string16 GetChromiumModelIdForProfile(const FilePath& profile_path);
 
   // Get the AppUserModelId for the App List, for the profile in |profile_path|.
   static string16 GetAppListAppModelIdForProfile(const FilePath& profile_path);
 
-  // Returns the path to the Chromium icon. This is used to specify the icon
-  // to use for the taskbar group on Win 7.
-  static string16 GetChromiumIconPath();
+  // Returns the string to the Chromium icon, (e.g., "C:\path\to\chrome.exe,0").
+  // This is used to specify the icon to use for the taskbar group on Win 7.
+  static string16 GetChromiumIconString();
 
   // Migrates existing chrome shortcuts by tagging them with correct app id.
   // see http://crbug.com/28104
   static void MigrateChromiumShortcuts();
 
   // Returns the path to the Start Menu shortcut for the given Chrome.
   static FilePath GetStartMenuShortcut(const FilePath& chrome_exe);
 #endif  // defined(OS_WIN)
 
   // The current default web client application UI state. This is used when
@@ skipping 137 matching lines @@
     // Set Chrome as the default handler for this protocol.
     virtual bool SetAsDefault(bool interactive_permitted) OVERRIDE;
 
     std::string protocol_;
 
     DISALLOW_COPY_AND_ASSIGN(DefaultProtocolClientWorker);
   };
 };
 
 #endif  // CHROME_BROWSER_SHELL_INTEGRATION_H_