Move prefs::kLastPolicyStatisticsUpdate to the policy component.

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"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
@@ skipping 2445 matching lines @@
 #endif
 
 // Counts how many more times the 'profile on a network share' warning should be
 // shown to the user before the next silence period.
 const char kNetworkProfileWarningsLeft[] = "network_profile.warnings_left";
 // Tracks the time of the last shown warning. Used to reset
 // |network_profile.warnings_left| after a silence period.
 const char kNetworkProfileLastWarningTime[] =
     "network_profile.last_warning_time";
 
-// 64-bit serialization of the time last policy usage statistics were collected
-// by UMA_HISTOGRAM_ENUMERATION.
-const char kLastPolicyStatisticsUpdate[] = "policy.last_statistics_update";
-
 #if defined(OS_CHROMEOS)
 // The RLZ brand code, if enabled.
 const char kRLZBrand[] = "rlz.brand";
 // Whether RLZ pings are disabled.
 const char kRLZDisabled[] = "rlz.disabled";
 #endif
 
 // The directory in user data dir that contains the profile to be used with the
 // app launcher.
 extern const char kAppListProfile[] = "app_list.profile";
@@ skipping 26 matching lines @@
 // ActivityLog initialization before the extension system is initialized.
 const char kWatchdogExtensionActive[] =
     "profile.extensions.activity_log.watchdog_extension_active";
 
 // A dictionary pref which maps profile names to dictionary values which hold
 // hashes of profile prefs that we track to detect changes that happen outside
 // of Chrome.
 const char kProfilePreferenceHashes[] = "profile.preference_hashes";
 
 }  // namespace prefs