X-Chrome-Variations logic refactoring

chrome/common/metrics/variations/variation_ids.h

 // 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.
 
 #ifndef CHROME_COMMON_METRICS_VARIATIONS_VARIATION_IDS_H_
 #define CHROME_COMMON_METRICS_VARIATIONS_VARIATION_IDS_H_
 
 namespace chrome_variations {
 
 // A list of Chrome Variation IDs. These IDs are associated with FieldTrials
@@ skipping 117 matching lines @@
   // reuse experiment IDs.
   kSuggestTrialStarted2012Q4IDMin = 3310029,
   kSuggestTrialStarted2012Q4IDMax = 3310048,
 
   // Name: Instant channel field trial.
   // Range: 3310050 - 3310059
   kChannelInstantIDBeta   = 3310050,
   kChannelInstantIDDev    = 3310051,
   kChannelInstantIDStable = 3310052,
 
+  // Name: OmniboxSearchSuggestTrialStarted2013Q1
+  // Range: 3310060 - 3310079
+  // Suggest (Autocomplete) field trial, 20 IDs.  This differs from
+  // the earlier omnibox suggest field trials in this file because
+  // we created a new trial (with a new name) in order to shuffle IDs.
+  // We assign new experiment IDs because it's a good practice not to
+  // reuse experiment IDs.
+  kSuggestTrialStarted2013Q1IDMin = 3310060,
+  kSuggestTrialStarted2013Q1IDMax = 3310079,
+
   // NEXT ID: When adding new IDs, please add them above this section, starting
   // with the value of kNextID, and updating kNextID to (end of your reserved
   // range) + 1.
-  kNextID = 3310060,
+  kNextID = 3310080,
 
 
   // USABLE IDs END HERE.
   //
   // The largest possible Chrome variation ID in the reserved range. When
   // defining your variation IDs, DO NOT exceed this value.
   kMaximumID = 3399999,
 };
 
 }  // namespace chrome_variations
 
 #endif  // CHROME_COMMON_METRICS_VARIATIONS_VARIATION_IDS_H_