Associate variation IDs with uniformity trials.

chrome/common/metrics/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_VARIATION_IDS_H_
 #define CHROME_COMMON_METRICS_VARIATION_IDS_H_
 #pragma once
 
 namespace chrome_variations {
 
@@ skipping 27 matching lines @@
 // please ensure that they are within the range of the min and max values.
 enum ID {
   // Used to represent no associated Chrome variation ID.
   kEmptyID = 0,
 
   // The smallest possible Chrome Variation ID in the reserved range. The
   // first 10,000 values are reserved for internal variations infrastructure
   // use. Please do not use values in this range.
   kMinimumID = 3300000,
 
+  kUniformity1PercentBase  = kMinimumID,
+  kUniformity5PercentBase  = kUniformity1PercentBase + 100,
+  kUniformity10PercentBase = kUniformity5PercentBase + 20,
+  kUniformity20PercentBase = kUniformity10PercentBase + 10,
+  kUniformity50PercentBase = kUniformity20PercentBase + 5,
+  kUniformityTrialsMax     = 3300136,
+
   // Some values reserved for unit and integration tests.
   kTestValueA = 3300200,
   kTestValueB = 3300201,
 
   // USABLE IDs BEGIN HERE.
   //
   // The smallest possible Chrome Variation ID for use in real FieldTrials. If
   // you are defining variation IDs for your own FieldTrials, NEVER use a value
   // lower than this.
   kMinimumUserID = 3310000,
 
   // Add new variation IDs below.
 
   // 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_VARIATION_IDS_H_