Revert "Start adding TLS (SSL) sockets to dart:io."

runtime/bin/tls_socket_macos.cc

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#include "bin/tls_socket.h"
-
-#include "bin/builtin.h"
-
-
-class TlsFilterPlatformData {
-};
-
-
-TlsFilter::TlsFilter() : in_handshake_(false) {
-  LockInitMutex();
-  if (!library_initialized_) {
-    InitializeLibrary();
-    library_initialized_ = true;
-  }
-  UnlockInitMutex();
-}
-
-
-void TlsFilter::InitializePlatformData() {
-  UNIMPLEMENTED();
-}
-
-
-void TlsFilter::InitializeLibrary() {
-  UNIMPLEMENTED();
-}
-
-
-void TlsFilter::Connect() {
-  UNIMPLEMENTED();
-}
-
-
-void TlsFilter::Destroy() {
-  UNIMPLEMENTED();
-}
-
-
-intptr_t TlsFilter::ProcessBuffer(int buffer_index) {
-  Dart_Handle buffer_object = dart_buffer_objects_[buffer_index];
-  Dart_Handle start_object = HandleError(
-      Dart_GetField(buffer_object, stringStart_));
-  Dart_Handle length_object = HandleError(
-      Dart_GetField(buffer_object, stringLength_));
-  int64_t unsafe_start = DartUtils::GetIntegerValue(start_object);
-  int64_t unsafe_length = DartUtils::GetIntegerValue(length_object);
-  if (unsafe_start < 0 || unsafe_start >= buffer_size_ ||
-      unsafe_length < 0 || unsafe_length > buffer_size_) {
-     Dart_ThrowException(DartUtils::NewDartIllegalArgumentException(
-         "Illegal .start or .length on a _TlsExternalBuffer"));
-  }
-  intptr_t start = static_cast<intptr_t>(unsafe_start);
-  intptr_t length = static_cast<intptr_t>(unsafe_length);
-
-  intptr_t bytes_processed = 0;
-  switch (buffer_index) {
-    case kReadPlaintext:
-    case kWriteEncrypted:
-      // Write from the filter to the buffer.
-      USE(start);
-      UNIMPLEMENTED();
-      break;
-    case kReadEncrypted:
-    case kWritePlaintext:
-      if (length > 0) {
-        // Write from the buffer to the filter.
-        UNIMPLEMENTED();
-      }
-      break;
-  }
-  return bytes_processed;
-}