Revert "Added ACM_dump protobuf, class for reading/writing and unittest."

webrtc/modules/audio_coding/main/acm2/dump.proto

-syntax = "proto2";
-option optimize_for = LITE_RUNTIME;
-package webrtc;
-
-// This is the main message to dump to a file, it can contain multiple event
-// messages, but it is possible to append multiple EventStreams (each with a
-// single event) to a file.
-// This has the benefit that there's no need to keep all data in memory.
-message ACMDumpEventStream {
-  repeated ACMDumpEvent stream = 1;
-}
-
-message ACMDumpEvent {
-  // required - Elapsed wallclock time in us since the start of the log.
-  optional int64 timestamp_us = 1;
-
-  // The different types of events that can occur, the UNKNOWN_EVENT entry
-  // is added in case future EventTypes are added, in that case old code will
-  // receive the new events as UNKNOWN_EVENT.
-  enum EventType {
-    UNKNOWN_EVENT = 0;
-    RTP_EVENT = 1;
-    DEBUG_EVENT = 2;
-  }
-
-  // required - Indicates the type of this event
-  optional EventType type = 2;
-
-  // optional - but required if type == RTP_EVENT
-  optional ACMDumpRTPPacket packet = 3;
-
-  // optional - but required if type == DEBUG_EVENT
-  optional ACMDumpDebugEvent debug_event = 4;
-}
-
-message ACMDumpRTPPacket {
-  // Indicates if the packet is incoming or outgoing with respect to the user
-  // that is logging the data.
-  enum Direction {
-    UNKNOWN_DIRECTION = 0;
-    OUTGOING = 1;
-    INCOMING = 2;
-  }
-  enum PayloadType {
-    UNKNOWN_TYPE = 0;
-    AUDIO = 1;
-    VIDEO = 2;
-    RTX = 3;
-  }
-
-  // required
-  optional Direction direction = 1;
-
-  // required
-  optional PayloadType type = 2;
-
-  // required - Contains the whole RTP packet (header+payload).
-  optional bytes RTP_data = 3;
-}
-
-message ACMDumpDebugEvent {
-  // Indicates the type of the debug event.
-  // LOG_START and LOG_END indicate the start and end of the log respectively.
-  // AUDIO_PLAYOUT indicates a call to the PlayoutData10Ms() function in ACM.
-  enum EventType {
-    UNKNOWN_EVENT = 0;
-    LOG_START = 1;
-    LOG_END = 2;
-    AUDIO_PLAYOUT = 3;
-  }
-
-  // required
-  optional EventType type = 1;
-
-  // An optional message that can be used to store additional information about
-  // the debug event.
-  optional string message = 2;
-}