Split a MetricsLogStore object out of MetricsLogManager.

components/metrics/metrics_log_manager.h

 // 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.
 
 #ifndef COMPONENTS_METRICS_METRICS_LOG_MANAGER_H_
 #define COMPONENTS_METRICS_METRICS_LOG_MANAGER_H_
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "components/metrics/metrics_log.h"
-#include "components/metrics/persisted_logs.h"
 
 namespace metrics {
 
+class MetricsLogStore;
+
 // Manages all the log objects used by a MetricsService implementation. Keeps
-// track of both an in progress log and a log that is staged for uploading as
-// text, as well as saving logs to, and loading logs from, persistent storage.
+// track of an in-progress log and a paused log.
 class MetricsLogManager {
  public:
-  // The metrics log manager will persist it's unsent logs by storing them in
-  // |local_state|, and will not persist ongoing logs over
-  // |max_ongoing_log_size|.
-  MetricsLogManager(PrefService* local_state, size_t max_ongoing_log_size);
+  MetricsLogManager();
   ~MetricsLogManager();
 
   // Makes |log| the current_log. This should only be called if there is not a
   // current log.
   void BeginLoggingWithLog(std::unique_ptr<MetricsLog> log);
 
   // Returns the in-progress log.
   MetricsLog* current_log() { return current_log_.get(); }
 
-  // Closes current_log(), compresses it, and stores the compressed log for
-  // later, leaving current_log() NULL.
-  void FinishCurrentLog();
-
-  // Returns true if there are any logs waiting to be uploaded.
-  bool has_unsent_logs() const {
-    return initial_log_queue_.size() || ongoing_log_queue_.size();
-  }
-
-  // Populates staged_log_text() with the next stored log to send.
-  // Should only be called if has_unsent_logs() is true.
-  void StageNextLogForUpload();
-
-  // Returns true if there is a log that needs to be, or is being, uploaded.
-  bool has_staged_log() const {
-    return initial_log_queue_.has_staged_log() ||
-        ongoing_log_queue_.has_staged_log();
-  }
-
-  // The text of the staged log, as a serialized protobuf.
-  // Will trigger a DCHECK if there is no staged log.
-  const std::string& staged_log() const {
-    return initial_log_queue_.has_staged_log() ?
-        initial_log_queue_.staged_log() : ongoing_log_queue_.staged_log();
-  }
-
-  // The SHA1 hash of the staged log.
-  // Will trigger a DCHECK if there is no staged log.
-  const std::string& staged_log_hash() const {
-    return initial_log_queue_.has_staged_log() ?
-        initial_log_queue_.staged_log_hash() :
-        ongoing_log_queue_.staged_log_hash();
-  }
-
-  // Discards the staged log.
-  void DiscardStagedLog();
+  // Closes |current_log_|, compresses it, and stores it in the |log_store| for
+  // later, leaving |current_log_| NULL.
+  void FinishCurrentLog(MetricsLogStore* log_store);
 
   // Closes and discards |current_log|.
   void DiscardCurrentLog();
 
   // Sets current_log to NULL, but saves the current log for future use with
   // ResumePausedLog(). Only one log may be paused at a time.
   // TODO(stuartmorgan): Pause/resume support is really a workaround for a
   // design issue in initial log writing; that should be fixed, and pause/resume
   // removed.
   void PauseCurrentLog();
 
   // Restores the previously paused log (if any) to current_log().
   // This should only be called if there is not a current log.
   void ResumePausedLog();
 
-  // Saves any unsent logs to persistent storage.
-  void PersistUnsentLogs();
-
-  // Loads any unsent logs from persistent storage.
-  void LoadPersistedUnsentLogs();
-
-  // Saves |log_data| as the given type. Public to allow to push log created by
-  // external components.
-  void StoreLog(const std::string& log_data, MetricsLog::LogType log_type);
-
  private:
-  // Tracks whether unsent logs (if any) have been loaded from the serializer.
-  bool unsent_logs_loaded_;
-
   // The log that we are still appending to.
   std::unique_ptr<MetricsLog> current_log_;
 
   // A paused, previously-current log.
   std::unique_ptr<MetricsLog> paused_log_;
 
-  // Logs that have not yet been sent.
-  PersistedLogs initial_log_queue_;
-  PersistedLogs ongoing_log_queue_;
-
   DISALLOW_COPY_AND_ASSIGN(MetricsLogManager);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_METRICS_LOG_MANAGER_H_