Media Remoting: Add mojo interfaces between browser and extension.

chrome/browser/media/cast_remoting_connector_messaging.h

-// Copyright 2016 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_MEDIA_CAST_REMOTING_CONNECTOR_MESSAGING_H_
-#define CHROME_BROWSER_MEDIA_CAST_REMOTING_CONNECTOR_MESSAGING_H_
-
-#include <stdint.h>
-
-#include <string>
-
-#include "base/strings/string_piece.h"
-
-// Utility functions for parsing messages from the Cast Provider to
-// CastRemotingConnector. These have been broken-out into this separate module
-// to allow for efficient building, linking and execution of these routines for
-// fuzzer testing.
-//
-// Note: If any additions/changes are made here, please update
-// cast_remoting_connector_fuzzertest.cc as well!
-class CastRemotingConnectorMessaging {
- public:
-  // Returns true if the given |message| from the Cast Provider matches the
-  // given |format| and the session ID in the |message| is equal to the
-  // |expected_session_id|.
-  static bool IsMessageForSession(const std::string& message,
-                                  const char* format,
-                                  unsigned int expected_session_id);
-
-  // Scans |message| for |specifier| and extracts the remoting stream ID that
-  // follows the specifier. Returns a negative value on error.
-  static int32_t GetStreamIdFromStartedMessage(base::StringPiece message,
-                                               base::StringPiece specifier);
-
-  // Simple command messages sent from/to the CastRemotingConnector to/from the
-  // Media Router Cast Provider to start/stop media remoting to a Cast device.
-  //
-  // Field separator (for tokenizing parts of messages).
-  static const char kMessageFieldSeparator;
-  // Message sent by CastRemotingConnector to Cast provider to start remoting.
-  // Example:
-  //   "START_CAST_REMOTING:session=1f"
-  static const char kStartRemotingMessageFormat[];
-  // Message sent by CastRemotingConnector to Cast provider to start the
-  // remoting RTP stream(s). Example:
-  //   "START_CAST_REMOTING_STREAMS:session=1f:audio=N:video=Y"
-  static const char kStartStreamsMessageFormat[];
-  // Start acknowledgement message sent by Cast provider to
-  // CastRemotingConnector once remoting RTP streams have been set up. Examples:
-  //   "STARTED_CAST_REMOTING_STREAMS:session=1f:audio_stream_id=2e:"
-  //                                                        "video_stream_id=3d"
-  //   "STARTED_CAST_REMOTING_STREAMS:session=1f:video_stream_id=b33f"
-  static const char kStartedStreamsMessageFormatPartial[];
-  static const char kStartedStreamsMessageAudioIdSpecifier[];
-  static const char kStartedStreamsMessageVideoIdSpecifier[];
-  // Stop message sent by CastRemotingConnector to Cast provider. Example:
-  //   "STOP_CAST_REMOTING:session=1f"
-  static const char kStopRemotingMessageFormat[];
-  // Stop acknowledgement message sent by Cast provider to CastRemotingConnector
-  // once remoting is available again after the last session ended. Example:
-  //   "STOPPED_CAST_REMOTING:session=1f"
-  static const char kStoppedMessageFormat[];
-  // Failure message sent by Cast provider to CastRemotingConnector any time
-  // there was a fatal error (e.g., the Cast provider failed to set up the RTP
-  // streams, or there was some unexpected external event). Example:
-  //   "FAILED_CAST_REMOTING:session=1f"
-  static const char kFailedMessageFormat[];
-};
-
-#endif  // CHROME_BROWSER_MEDIA_CAST_REMOTING_CONNECTOR_MESSAGING_H_