Move //components/metrics/compression_utils into standalone component

chrome/browser/metrics/variations/variations_seed_store_unittest.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 "chrome/browser/metrics/variations/variations_seed_store.h"
 
 #include "base/base64.h"
 #include "base/prefs/testing_pref_service.h"
-#include "components/metrics/compression_utils.h"
+#include "components/compression/compression_utils.h"
 #include "components/variations/pref_names.h"
 #include "components/variations/proto/study.pb.h"
 #include "components/variations/proto/variations_seed.pb.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chrome_variations {
 
 namespace {
 
 class TestVariationsSeedStore : public VariationsSeedStore {
@@ skipping 37 matching lines @@
 // Serializes |seed| to protobuf binary format.
 std::string SerializeSeed(const variations::VariationsSeed& seed) {
   std::string serialized_seed;
   seed.SerializeToString(&serialized_seed);
   return serialized_seed;
 }
 
 // Compresses |data| using Gzip compression and returns the result.
 std::string Compress(const std::string& data) {
   std::string compressed;
-  const bool result = metrics::GzipCompress(data, &compressed);
+  const bool result = compression::GzipCompress(data, &compressed);
   EXPECT_TRUE(result);
   return compressed;
 }
 
 // Serializes |seed| to compressed base64-encoded protobuf binary format.
 std::string SerializeSeedBase64(const variations::VariationsSeed& seed) {
   std::string serialized_seed = SerializeSeed(seed);
   std::string base64_serialized_seed;
   base::Base64Encode(Compress(serialized_seed), &base64_serialized_seed);
   return base64_serialized_seed;
@@ skipping 262 matching lines @@
   EXPECT_TRUE(base::Base64Decode(base64_after_seed_data, &after_seed_data));
   EXPECT_TRUE(base::Base64Decode(base64_delta_data, &delta_data));
 
   std::string output;
   EXPECT_TRUE(VariationsSeedStore::ApplyDeltaPatch(before_seed_data, delta_data,
                                                    &output));
   EXPECT_EQ(after_seed_data, output);
 }
 
 }  // namespace chrome_variations