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

chrome/installer/setup/install_worker.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 file contains the definitions of the installer functions that build
 // the WorkItemList used to install the application.
 
 #include "chrome/installer/setup/install_worker.h"
 
 #include <oaidl.h>
@@ skipping 603 matching lines @@
         browser_dist->GetAppShortCutName(), true);
     install_list->AddSetRegValueWorkItem(reg_root,
         uninstall_reg, installer::kUninstallStringField,
         quoted_uninstall_cmd.GetCommandLineString(), true);
     install_list->AddSetRegValueWorkItem(reg_root,
                                          uninstall_reg,
                                          L"InstallLocation",
                                          install_path.value(),
                                          true);
 
-    // TODO(huangs): Generalize this, so app_host.exe can get its own icon,
-    // and not rely on chrome.exe's.
-    // DisplayIcon, NoModify and NoRepair
-    string16 chrome_icon = ShellUtil::GetChromeIcon(
-        product.distribution(),
-        install_path.Append(installer::kChromeExe).value());
+    BrowserDistribution* dist = product.distribution();
+    string16 chrome_icon = ShellUtil::FormatIconLocation(
+        install_path.Append(dist->GetIconFilename()).value(),
+        dist->GetIconIndex());
     install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
                                          L"DisplayIcon", chrome_icon, true);
     install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
                                          L"NoModify", static_cast<DWORD>(1),
                                          true);
     install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
                                          L"NoRepair", static_cast<DWORD>(1),
                                          true);
 
     install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
@@ skipping 973 matching lines @@
     // Log everything for now.
     cmd_line.AppendSwitch(installer::switches::kVerboseLogging);
 
     AppCommand cmd(cmd_line.GetCommandLineString());
     cmd.set_is_auto_run_on_os_upgrade(true);
     cmd.AddWorkItems(installer_state.root_key(), cmd_key, install_list);
   }
 }
 
 }  // namespace installer