Move //components/metrics/compression_utils into standalone component

chrome/browser/metrics/variations/variations_seed_store.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/metrics/histogram_macros.h"
 #include "base/numerics/safe_math.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
-#include "components/metrics/compression_utils.h"
+#include "components/compression/compression_utils.h"
 #include "components/variations/pref_names.h"
 #include "components/variations/proto/variations_seed.pb.h"
 #include "crypto/signature_verifier.h"
 #include "third_party/protobuf/src/google/protobuf/io/coded_stream.h"
 
 namespace chrome_variations {
 
 namespace {
 
 // Signature verification is disabled on mobile platforms for now, since it
@@ skipping 299 matching lines @@
   // If the decode process fails, assume the pref value is corrupt and clear it.
   std::string decoded_data;
   if (!base::Base64Decode(base64_seed_data, &decoded_data)) {
     ClearPrefs();
     RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_CORRUPT_BASE64);
     return false;
   }
 
   if (!is_compressed) {
     seed_data->swap(decoded_data);
-  } else if (!metrics::GzipUncompress(decoded_data, seed_data)) {
+  } else if (!compression::GzipUncompress(decoded_data, seed_data)) {
     ClearPrefs();
     RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_CORRUPT_GZIP);
     return false;
   }
 
   return true;
 }
 
 bool VariationsSeedStore::StoreSeedDataNoDelta(
     const std::string& seed_data,
@@ skipping 19 matching lines @@
     UMA_HISTOGRAM_ENUMERATION("Variations.StoreSeedSignature", result,
                               VARIATIONS_SEED_SIGNATURE_ENUM_SIZE);
     if (result != VARIATIONS_SEED_SIGNATURE_VALID) {
       RecordSeedStoreHistogram(VARIATIONS_SEED_STORE_FAILED_SIGNATURE);
       return false;
     }
   }
 
   // Compress the seed before base64-encoding and storing.
   std::string compressed_seed_data;
-  if (!metrics::GzipCompress(seed_data, &compressed_seed_data)) {
+  if (!compression::GzipCompress(seed_data, &compressed_seed_data)) {
     RecordSeedStoreHistogram(VARIATIONS_SEED_STORE_FAILED_GZIP);
     return false;
   }
 
   std::string base64_seed_data;
   base::Base64Encode(compressed_seed_data, &base64_seed_data);
 
   // TODO(asvitkine): This pref is no longer being used. Remove it completely
   // in M45+.
   local_state_->ClearPref(prefs::kVariationsSeed);
@@ skipping 59 matching lines @@
       end_offset += length;
       if (!end_offset.IsValid() || end_offset.ValueOrDie() > existing_data_size)
         return false;
       output->append(existing_data, offset, length);
     }
   }
   return true;
 }
 
 }  // namespace chrome_variations