Move chromeos::device_event_log into components.

chromeos/device_event_log_impl.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 CHROMEOS_DEVICE_EVENT_LOG_IMPL_H_
-#define CHROMEOS_DEVICE_EVENT_LOG_IMPL_H_
-
-#include <list>
-#include <string>
-
-#include "base/time/time.h"
-#include "chromeos/chromeos_export.h"
-#include "chromeos/device_event_log.h"
-
-namespace chromeos {
-
-namespace device_event_log {
-
-class CHROMEOS_EXPORT DeviceEventLogImpl {
- public:
-  struct LogEntry {
-    LogEntry(const char* filedesc,
-             int file_line,
-             LogType log_type,
-             LogLevel log_level,
-             const std::string& event);
-
-    std::string file;
-    int file_line;
-    LogType log_type;
-    LogLevel log_level;
-    std::string event;
-    base::Time time;
-    int count;
-  };
-
-  explicit DeviceEventLogImpl(size_t max_entries);
-  ~DeviceEventLogImpl();
-
-  // Implements device_event_log::AddEntry.
-  void AddEntry(const char* file,
-                int file_line,
-                LogType type,
-                LogLevel level,
-                const std::string& event);
-
-  // Implements device_event_log::GetAsString.
-  std::string GetAsString(StringOrder order,
-                          const std::string& format,
-                          const std::string& types,
-                          LogLevel max_level,
-                          size_t max_events);
-
-  // Called from device_event_log::AddEntry if the global instance has not been
-  // created (or has already been destroyed). Logs to LOG(ERROR) or VLOG(1).
-  static void SendToVLogOrErrorLog(const char* file,
-                                   int file_line,
-                                   LogType type,
-                                   LogLevel log_level,
-                                   const std::string& event);
-
- private:
-  friend class DeviceEventLogTest;
-
-  typedef std::list<LogEntry> LogEntryList;
-
-  void AddLogEntry(const LogEntry& entry);
-
-  // For testing
-  size_t max_entries() const { return max_entries_; }
-  void set_max_entries_for_test(size_t entries) { max_entries_ = entries; }
-
-  size_t max_entries_;
-  LogEntryList entries_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeviceEventLogImpl);
-};
-
-}  // namespace device_event_log
-
-}  // namespace chromeos
-
-#endif  // CHROMEOS_DEVICE_EVENT_LOG_IMPL_H_