[Cleanup] Clean up the VariationsSeedStore's histograms.

components/variations/metrics.h

+// Copyright 2017 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 COMPONENTS_VARIATIONS_METRICS_H_
+#define COMPONENTS_VARIATIONS_METRICS_H_
+
+#include "build/build_config.h"
+
+namespace variations {
+
+#if defined(OS_ANDROID)
+// The result of importing a seed during Android first run.
+// Note: UMA histogram enum - don't re-order or remove entries.
+enum class FirstRunSeedImportResult {
+  SUCCESS,
+  FAIL_NO_CALLBACK,
+  FAIL_NO_FIRST_RUN_SEED,
+  FAIL_STORE_FAILED,
+  FAIL_INVALID_RESPONSE_DATE,
+  ENUM_SIZE
+};
+#endif  // OS_ANDROID
+
+// The result of attempting to load a variations seed on startup.
+// Note: UMA histogram enum - don't re-order or remove entries.
+enum class LoadSeedResult {
+  SUCCESS,
+  EMPTY,
+  CORRUPT,
+  INVALID_SIGNATURE,
+  CORRUPT_BASE64,
+  CORRUPT_PROTOBUF,
+  CORRUPT_GZIP,
+  ENUM_SIZE
+};
+
+// The result of attempting to store a variations seed received from the server.
+// Note: UMA histogram enum - don't re-order or remove entries.
+enum class StoreSeedResult {
+  SUCCESS,
+  FAILED_EMPTY,
+  FAILED_PARSE,
+  FAILED_SIGNATURE,
+  FAILED_GZIP,
+  // DELTA_COUNT is not so much a result of the seed store, but rather counting
+  // the number of delta-compressed seeds the SeedStore() function saw. Kept in
+  // the same histogram for convenience of comparing against the other values.
+  DELTA_COUNT,
+  FAILED_DELTA_READ_SEED,
+  FAILED_DELTA_APPLY,
+  FAILED_DELTA_STORE,
+  FAILED_UNGZIP,
+  FAILED_EMPTY_GZIP_CONTENTS,
+  FAILED_UNSUPPORTED_SEED_FORMAT,
+  ENUM_SIZE
+};
+
+// The result of updating the date associated with an existing stored variations
+// seed.
+// Note: UMA histogram enum - don't re-order or remove entries.
+enum class UpdateSeedDateResult {
+  NO_OLD_DATE,
+  NEW_DATE_IS_OLDER,
+  SAME_DAY,
+  NEW_DAY,
+  ENUM_SIZE
+};
+
+// The result of verifying a variation seed's signature.
+// Note: UMA histogram enum - don't re-order or remove entries.
+enum class VerifySignatureResult {
+  MISSING_SIGNATURE,
+  DECODE_FAILED,
+  INVALID_SIGNATURE,
+  INVALID_SEED,
+  VALID_SIGNATURE,
+  ENUM_SIZE
+};
+
+#if defined(OS_ANDROID)
+// Records the result of importing a seed during Android first run.
+void RecordFirstRunSeedImportResult(FirstRunSeedImportResult result);
+#endif  // OS_ANDROID
+
+// Records the result of attempting to load a variations seed on startup.
+void RecordLoadSeedResult(LoadSeedResult state);
+
+// Records the result of attempting to store a variations seed received from the
+// server.
+void RecordStoreSeedResult(StoreSeedResult result);
+
+}  // namespace variations
+
+#endif  // COMPONENTS_VARIATIONS_METRICS_H_