Move (most of) chrome/browser/drive into components/drive/service.

chrome/browser/drive/event_logger.h

-// Copyright (c) 2012 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 CHROME_BROWSER_DRIVE_EVENT_LOGGER_H_
-#define CHROME_BROWSER_DRIVE_EVENT_LOGGER_H_
-
-#include <deque>
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/logging.h"
-#include "base/synchronization/lock.h"
-#include "base/time/time.h"
-
-namespace drive {
-
-// The default history size used by EventLogger.
-const int kDefaultHistorySize = 1000;
-
-// EventLogger is used to collect and expose text messages for diagnosing
-// behaviors of Google APIs stuff. For instance, the collected messages are
-// exposed to chrome:drive-internals.
-class EventLogger {
- public:
-  // Represents a single event log.
-  struct Event {
-    Event(int id, logging::LogSeverity severity, const std::string& what);
-    int id;  // Monotonically increasing ID starting from 0.
-    logging::LogSeverity severity;  // Severity of the event.
-    base::Time when;  // When the event occurred.
-    std::string what;  // What happened.
-  };
-
-  // Creates an event logger that keeps the latest kDefaultHistorySize events.
-  EventLogger();
-  ~EventLogger();
-
-  // Logs a message and its severity.
-  // Can be called from any thread as long as the object is alive.
-  void LogRawString(logging::LogSeverity severity, const std::string& what);
-
-  // Logs a message with formatting.
-  // Can be called from any thread as long as the object is alive.
-  void Log(logging::LogSeverity severity, const char* format, ...)
-      PRINTF_FORMAT(3, 4);
-
-  // Sets the history size. The existing history is cleared.
-  // Can be called from any thread as long as the object is alive.
-  void SetHistorySize(size_t history_size);
-
-  // Gets the list of latest events (the oldest event comes first).
-  // Can be called from any thread as long as the object is alive.
-  std::vector<Event> GetHistory();
-
- private:
-  std::deque<Event> history_;  // guarded by lock_.
-  size_t history_size_;  // guarded by lock_.
-  int next_event_id_;  // guarded by lock_.
-  base::Lock lock_;
-
-  DISALLOW_COPY_AND_ASSIGN(EventLogger);
-};
-
-}  // namespace drive
-
-#endif  // CHROME_BROWSER_DRIVE_EVENT_LOGGER_H_