Add support to Google Update wrappers for the "automatic updates only" group policy setting.

chrome/browser/google/google_update_win.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.
 
 #include "chrome/browser/google/google_update_win.h"
 
 #include <atlbase.h>
 #include <atlcom.h>
 
 #include "base/bind.h"
@@ skipping 42 matching lines @@
                << L". The standard location is: "
                    << user_exe_path.value().c_str()
                << L" or " << machine_exe_path.value().c_str() << L".";
     return CANNOT_UPGRADE_CHROME_IN_THIS_DIRECTORY;
   }
 
   string16 app_guid = installer::GetAppGuidForUpdates(
       !InstallUtil::IsPerUserInstall(chrome_exe_path.value().c_str()));
   DCHECK(!app_guid.empty());
 
-  if (GoogleUpdateSettings::GetAppUpdatePolicy(app_guid, NULL) ==
-      GoogleUpdateSettings::UPDATES_DISABLED)
+  GoogleUpdateSettings::UpdatePolicy update_policy =
+      GoogleUpdateSettings::GetAppUpdatePolicy(app_guid, NULL);
+
+  if (update_policy == GoogleUpdateSettings::UPDATES_DISABLED)
     return GOOGLE_UPDATE_DISABLED_BY_POLICY;
 
+  if (update_policy == GoogleUpdateSettings::AUTO_UPDATES_ONLY)
+    return GOOGLE_UPDATE_DISABLED_BY_POLICY_AUTO_ONLY;
+
   return GOOGLE_UPDATE_NO_ERROR;
 #endif
 }
 
 // Creates an instance of a COM Local Server class using either plain vanilla
 // CoCreateInstance, or using the Elevation moniker if running on Vista.
 // hwnd must refer to a foregound window in order to get the UAC prompt
 // showing up in the foreground if running on Vista. It can also be NULL if
 // background UAC prompts are desired.
 HRESULT CoCreateInstanceAsAdmin(REFCLSID class_id, REFIID interface_id,
@@ skipping 321 matching lines @@
                                  base::MessageLoop* main_loop) {
   NOTREACHED() << "Communication with Google Update failed: " << hr
                << " error: " << error_code
                << ", message: " << error_message.c_str();
   main_loop->PostTask(
       FROM_HERE,
       base::Bind(&GoogleUpdate::ReportResults, this,
                  UPGRADE_ERROR, error_code, error_message));
   return false;
 }