Revert of [cast_channel] Move cast_channel related files from //extensions to //components

extensions/browser/api/cast_channel/logger.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 EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_
+#define EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_
+
+#include <stddef.h>
+
+#include <deque>
+#include <map>
+#include <memory>
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/threading/thread_checker.h"
+#include "extensions/common/api/cast_channel/logging.pb.h"
+
+
+namespace extensions {
+namespace api {
+namespace cast_channel {
+
+struct AuthResult;
+
+// Holds the most recent errors encountered by a CastSocket.
+struct LastErrors {
+ public:
+  LastErrors();
+  ~LastErrors();
+
+  // The most recent event that occurred at the time of the error.
+  proto::EventType event_type;
+
+  // The most recent ChallengeReplyErrorType logged for the socket.
+  proto::ChallengeReplyErrorType challenge_reply_error_type;
+
+  // The most recent net_return_value logged for the socket.
+  int net_return_value;
+};
+
+// Called with events that occur on a Cast Channel and remembers any that
+// warrant reporting to the caller in LastErrors.
+class Logger : public base::RefCountedThreadSafe<Logger> {
+ public:
+  Logger();
+
+  // For events that involves socket / crypto operations that returns a value.
+  void LogSocketEventWithRv(int channel_id,
+                            proto::EventType event_type,
+                            int rv);
+
+  // For AUTH_CHALLENGE_REPLY event.
+  void LogSocketChallengeReplyEvent(int channel_id,
+                                    const AuthResult& auth_result);
+
+  // Returns the last errors logged for |channel_id|.
+  LastErrors GetLastErrors(int channel_id) const;
+
+  // Removes a LastErrors entry for |channel_id| if one exists.
+  void ClearLastErrors(int channel_id);
+
+ private:
+  friend class base::RefCountedThreadSafe<Logger>;
+  ~Logger();
+
+  using LastErrorsMap = std::map<int, LastErrors>;
+
+  // Returns a SocketEvent proto with common fields (EventType, timestamp)
+  // populated.
+  proto::SocketEvent CreateEvent(proto::EventType event_type);
+
+  // Uses |event| associated with |channel_id| to update its LastErrors.
+  void LogSocketEvent(int channel_id, const proto::SocketEvent& socket_event);
+
+  LastErrorsMap last_errors_;
+
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(Logger);
+};
+}  // namespace cast_channel
+}  // namespace api
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_