Removing Variations support for google_update_experiment_id.

components/variations/experiment_labels.cc

 // Copyright 2014 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 "components/variations/experiment_labels.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/variations/variations_associated_data.h"
 #include "components/variations/variations_experiment_util.h"
 
 namespace variations {
 
 namespace {
 
 const char kVariationPrefix[] = "CrVar";
 
-// This method builds a single experiment label for a Chrome Variation,
-// including a timestamp that is a year in the future from |current_time|. Since
-// multiple headers can be transmitted, |count| is a number that is appended
-// after the label key to differentiate the labels.
-base::string16 CreateSingleExperimentLabel(int count,
-                                           variations::VariationID id,
-                                           const base::Time& current_time) {
-  // Build the parts separately so they can be validated.
-  const base::string16 key =
-      base::ASCIIToUTF16(kVariationPrefix) + base::IntToString16(count);
-  DCHECK_LE(key.size(), 8U);
-  const base::string16 value = base::IntToString16(id);
-  DCHECK_LE(value.size(), 8U);
-  base::string16 label(key);
-  label += base::ASCIIToUTF16("=");
-  label += value;
-  label += base::ASCIIToUTF16("|");
-  label += variations::BuildExperimentDateString(current_time);
-  return label;
-}
-
 }  // namespace
 
-base::string16 BuildGoogleUpdateExperimentLabel(
-    const base::FieldTrial::ActiveGroups& active_groups) {
-  base::string16 experiment_labels;
-  int counter = 0;
-
-  const base::Time current_time(base::Time::Now());
-
-  // Find all currently active VariationIDs associated with Google Update.
-  for (base::FieldTrial::ActiveGroups::const_iterator it =
-       active_groups.begin(); it != active_groups.end(); ++it) {
-    const variations::VariationID id =
-        variations::GetGoogleVariationID(variations::GOOGLE_UPDATE_SERVICE,
-                                         it->trial_name, it->group_name);
-
-    if (id == variations::EMPTY_ID)
-      continue;
-
-    if (!experiment_labels.empty())
-      experiment_labels += variations::kExperimentLabelSeparator;
-    experiment_labels += CreateSingleExperimentLabel(++counter, id,
-                                                     current_time);
-  }
-
-  return experiment_labels;
-}
-
 base::string16 ExtractNonVariationLabels(const base::string16& labels) {
   // First, split everything by the label separator.
   std::vector<base::StringPiece16> entries = base::SplitStringPiece(
       labels, base::StringPiece16(&variations::kExperimentLabelSeparator, 1),
       base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
 
   // For each label, keep the ones that do not look like a Variations label.
   base::string16 non_variation_labels;
   for (const base::StringPiece16& entry : entries) {
     if (entry.empty() ||
         base::StartsWith(entry,
                          base::ASCIIToUTF16(kVariationPrefix),
                          base::CompareCase::INSENSITIVE_ASCII)) {
       continue;
     }
 
     // Dump the whole thing, including the timestamp.
     if (!non_variation_labels.empty())
       non_variation_labels += variations::kExperimentLabelSeparator;
     entry.AppendToString(&non_variation_labels);
   }
 
   return non_variation_labels;
 }
 
-base::string16 CombineExperimentLabels(const base::string16& variation_labels,
-                                       const base::string16& other_labels) {
-  base::StringPiece16 separator(&variations::kExperimentLabelSeparator, 1);
-  DCHECK(!base::StartsWith(variation_labels, separator,
-                           base::CompareCase::SENSITIVE));
-  DCHECK(!base::EndsWith(variation_labels, separator,
-                         base::CompareCase::SENSITIVE));
-  DCHECK(!base::StartsWith(other_labels, separator,
-                           base::CompareCase::SENSITIVE));
-  DCHECK(!base::EndsWith(other_labels, separator,
-                         base::CompareCase::SENSITIVE));
-  // Note that if either label is empty, a separator is not necessary.
-  base::string16 combined_labels = other_labels;
-  if (!other_labels.empty() && !variation_labels.empty())
-    combined_labels += variations::kExperimentLabelSeparator;
-  combined_labels += variation_labels;
-  return combined_labels;
-}
-
 }  // namespace variations