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

chrome/common/metrics/variations/experiment_labels.h

-// Copyright 2013 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_EXPERIMENT_LABELS_H_
-#define CHROME_COMMON_METRICS_VARIATIONS_EXPERIMENT_LABELS_H_
-
-#include "base/metrics/field_trial.h"
-#include "base/strings/string16.h"
-
-namespace chrome_variations {
-
-// Takes the list of active groups and builds the label for the ones that have
-// Google Update VariationID associated with them. This will return an empty
-// string if there are no such groups.
-base::string16 BuildGoogleUpdateExperimentLabel(
-    const base::FieldTrial::ActiveGroups& active_groups);
-
-// Creates a final combined experiment labels string with |variation_labels|
-// and |other_labels|, appropriately appending a separator based on their
-// contents. It is assumed that |variation_labels| and |other_labels| do not
-// have leading or trailing separators.
-base::string16 CombineExperimentLabels(const base::string16& variation_labels,
-                                       const base::string16& other_labels);
-
-// Takes the value of experiment_labels from the registry and returns a valid
-// experiment_labels string value containing only the labels that are not
-// associated with Chrome Variations.
-base::string16 ExtractNonVariationLabels(const base::string16& labels);
-
-}  // namespace chrome_variations
-
-#endif  // CHROME_COMMON_METRICS_VARIATIONS_EXPERIMENT_LABELS_H_