Remove PathCloseFrame, QuicPathId, DefaultPathId and InvalidPathId.

net/quic/core/quic_framer.cc

Index: net/quic/core/quic_framer.cc
diff --git a/net/quic/core/quic_framer.cc b/net/quic/core/quic_framer.cc
index 68a0fb8394a53063532c7a65903a2bb08f5404a2..bacec506b4d1305b2157296e723494bd1c606b0e 100644
--- a/net/quic/core/quic_framer.cc
+++ b/net/quic/core/quic_framer.cc
@@ -207,11 +207,6 @@ size_t QuicFramer::GetBlockedFrameSize() {
 }
 
 // static
-size_t QuicFramer::GetPathCloseFrameSize() {
-  return kQuicFrameTypeSize + kQuicPathIdSize;
-}
-
-// static
 size_t QuicFramer::GetStreamIdSize(QuicStreamId stream_id) {
   // Sizes are 1 through 4 bytes.
   for (int i = 1; i <= 4; ++i) {
@@ -398,12 +393,6 @@ size_t QuicFramer::BuildDataPacket(const QuicPacketHeader& header,
           return 0;
         }
         break;
-      case PATH_CLOSE_FRAME:
-        if (!AppendPathCloseFrame(*frame.path_close_frame, &writer)) {
-          QUIC_BUG << "AppendPathCloseFrame failed";
-          return 0;
-        }
-        break;
       default:
         RaiseError(QUIC_INVALID_FRAME_DATA);
         QUIC_BUG << "QUIC_INVALID_FRAME_DATA";
@@ -1118,19 +1107,6 @@ bool QuicFramer::ProcessFrameData(QuicDataReader* reader,
         }
         continue;
       }
-      case PATH_CLOSE_FRAME: {
-        QuicPathCloseFrame path_close_frame;
-        if (!ProcessPathCloseFrame(reader, &path_close_frame)) {
-          return RaiseError(QUIC_INVALID_PATH_CLOSE_DATA);
-        }
-        if (!visitor_->OnPathCloseFrame(path_close_frame)) {
-          QUIC_DVLOG(1) << ENDPOINT
-                        << "Visitor asked to stop further processing.";
-          // Returning true since there was no parsing error.
-          return true;
-        }
-        continue;
-      }
 
       default:
         set_detailed_error("Illegal frame type.");
@@ -1454,16 +1430,6 @@ bool QuicFramer::ProcessBlockedFrame(QuicDataReader* reader,
   return true;
 }
 
-bool QuicFramer::ProcessPathCloseFrame(QuicDataReader* reader,
-                                       QuicPathCloseFrame* frame) {
-  if (!reader->ReadBytes(&frame->path_id, 1)) {
-    set_detailed_error("Unable to read path_id.");
-    return false;
-  }
-
-  return true;
-}
-
 // static
 QuicStringPiece QuicFramer::GetAssociatedDataFromEncryptedPacket(
     QuicVersion version,
@@ -1704,8 +1670,6 @@ size_t QuicFramer::ComputeFrameLength(
       return GetWindowUpdateFrameSize();
     case BLOCKED_FRAME:
       return GetBlockedFrameSize();
-    case PATH_CLOSE_FRAME:
-      return GetPathCloseFrameSize();
     case PADDING_FRAME:
       DCHECK(false);
       return 0;
@@ -2139,15 +2103,6 @@ bool QuicFramer::AppendBlockedFrame(const QuicBlockedFrame& frame,
   return true;
 }
 
-bool QuicFramer::AppendPathCloseFrame(const QuicPathCloseFrame& frame,
-                                      QuicDataWriter* writer) {
-  uint8_t path_id = static_cast<uint8_t>(frame.path_id);
-  if (!writer->WriteUInt8(path_id)) {
-    return false;
-  }
-  return true;
-}
-
 bool QuicFramer::RaiseError(QuicErrorCode error) {
   QUIC_DLOG(INFO) << ENDPOINT << "Error: " << QuicErrorCodeToString(error)
                   << " detail: " << detailed_error_;