Move chrome/common/metrics/variations to chrome/common/variations.

chrome/common/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_
+#ifndef CHROME_COMMON_VARIATIONS_VARIATION_IDS_H_
+#define CHROME_COMMON_VARIATIONS_VARIATION_IDS_H_
 
 namespace chrome_variations {
 
 // A list of Chrome Variation IDs. These IDs are associated with FieldTrials
 // for re-identification and analysis on Google servers.
 // These enums are to be used with the experiments_helper ID associoation API.
 //
 // The IDs are defined as part of an enum to prevent re-use. When adding your
 // own IDs, please respect the reserved IDs of other groups, as well as the
 // global range of permitted values.
@@ skipping 316 matching lines @@
   // USABLE IDs END HERE.
   //
   // The largest possible Chrome variation ID in the reserved range. When
   // defining your variation IDs, DO NOT exceed this value - GWS will ignore
   // your experiment!
   MAXIMUM_ID = 3399999,
 };
 
 }  // namespace chrome_variations
 
-#endif  // CHROME_COMMON_METRICS_VARIATIONS_VARIATION_IDS_H_
+#endif  // CHROME_COMMON_VARIATIONS_VARIATION_IDS_H_