Add new instant extended specific pref.

chrome/common/pref_names.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/common/pref_names.h"
 
 #include "base/basictypes.h"
 
 namespace prefs {
 
@@ skipping 469 matching lines @@
 
 // Allows access to the listed host patterns, as exceptions to the blacklist.
 const char kUrlWhitelist[] = "policy.url_whitelist";
 
 // Boolean pref indicating whether the instant confirm dialog has been shown.
 const char kInstantConfirmDialogShown[] = "instant.confirm_dialog_shown";
 
 // Boolean pref indicating if instant is enabled.
 const char kInstantEnabled[] = "instant.enabled";
 
+// Boolean pref indicating if instant is enabled for instant extended.
+const char kInstantExtendedEnabled[] = "instant_extended.enabled";
+
 // Prefix URL for the experimental Instant ZeroSuggest provider.
 const char kInstantUIZeroSuggestUrlPrefix[] =
     "instant_ui.zero_suggest_url_prefix";
 
 // Used to migrate preferences from local state to user preferences to
 // enable multiple profiles.
 // BITMASK with possible values (see browser_prefs.cc for enum):
 // 0: No preferences migrated.
 // 1: DNS preferences migrated: kDnsPrefetchingStartupList and HostReferralList
 // 2: Browser window preferences migrated: kDevToolsSplitLocation and
@@ skipping 1664 matching lines @@
 
 #if defined(OS_CHROMEOS)
 // Indicates whether the RLZ tracking has been enabled by user.
 const char kRLZEnabled[] = "rlz.enabled";
 
 // The RLZ brand code, if enabled.
 const char kRLZBrand[] = "rlz.brand";
 #endif
 
 }  // namespace prefs