Makes the instant url managed by group policy.

chrome/common/policy_constants.h

 // Copyright (c) 2010 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_COMMON_POLICY_CONSTANTS_H_
 #define CHROME_COMMON_POLICY_CONSTANTS_H_
 #pragma once
 
 #include "build/build_config.h"
 
 namespace policy {
 
 #if defined(OS_WIN)
 // The windows registry path we read the policy configuration from.
 extern const wchar_t kRegistrySubKey[];
 #endif
 
 // Key names for the policy settings.
 namespace key {
 
 extern const char kHomepageLocation[];
 extern const char kHomepageIsNewTabPage[];
 extern const char kRestoreOnStartup[];
 extern const char kURLsToRestoreOnStartup[];
 extern const char kDefaultSearchProviderEnabled[];
 extern const char kDefaultSearchProviderName[];
 extern const char kDefaultSearchProviderKeyword[];
 extern const char kDefaultSearchProviderSearchURL[];
 extern const char kDefaultSearchProviderSuggestURL[];
+extern const char kDefaultSearchProviderInstantURL[];
 extern const char kDefaultSearchProviderIconURL[];
 extern const char kDefaultSearchProviderEncodings[];
 extern const char kDisableSpdy[];
 extern const char kProxyMode[];
 extern const char kProxyServer[];
 extern const char kProxyPacUrl[];
 extern const char kProxyBypassList[];
 extern const char kAlternateErrorPagesEnabled[];
 extern const char kSearchSuggestEnabled[];
 extern const char kDnsPrefetchingEnabled[];
@@ skipping 38 matching lines @@
 #if defined(OS_CHROMEOS)
 // ChromeOS policy constants
 extern const char kChromeOsLockOnIdleSuspend[];
 #endif
 
 }  // namespace key
 
 }  // namespace policy
 
 #endif  // CHROME_COMMON_POLICY_CONSTANTS_H_