[Metrics] Move CachingPermutedEntropyProvider into the variations 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 1331 matching lines @@
 // A boolean pref of the EULA accepted flag.
 const char kEulaAccepted[] = "EulaAccepted";
 
 // The metrics client GUID, entropy source and session ID.
 // Note: The names client_id2 and low_entropy_source2 are a result of creating
 // new prefs to do a one-time reset of the previous values.
 const char kMetricsClientID[] = "user_experience_metrics.client_id2";
 const char kMetricsSessionID[] = "user_experience_metrics.session_id";
 const char kMetricsLowEntropySource[] =
     "user_experience_metrics.low_entropy_source2";
-const char kMetricsPermutedEntropyCache[] =
-    "user_experience_metrics.permuted_entropy_cache";
 
 // Old client id and low entropy source values, cleared the first time this
 // version is launched.
 // TODO(asvitkine): Delete these after a few releases have gone by and old
 // values have been cleaned up. http://crbug.com/357704
 const char kMetricsOldClientID[] = "user_experience_metrics.client_id";
 const char kMetricsOldLowEntropySource[] =
     "user_experience_metrics.low_entropy_source";
 
 // Boolean that specifies whether or not crash reporting and metrics reporting
@@ skipping 1157 matching lines @@
 // "mapped_title" entries, detailing the bookmark target URL (if any), the title
 // given by the PartnerBookmarksProvider and either the user-visible renamed
 // title or an empty string if the bookmark node was removed.
 const char kPartnerBookmarkMappings[] = "partnerbookmarks.mappings";
 #endif
 
 // Whether DNS Quick Check is disabled in proxy resolution.
 const char kQuickCheckEnabled[] = "proxy.quick_check_enabled";
 
 }  // namespace prefs