Stop running pub get at gclient sync time and fix build bugs

mojo/public/dart/third_party/mime/lib/src/mime_multipart_transformer.dart

Index: mojo/public/dart/third_party/mime/lib/src/mime_multipart_transformer.dart
diff --git a/mojo/public/dart/third_party/mime/lib/src/mime_multipart_transformer.dart b/mojo/public/dart/third_party/mime/lib/src/mime_multipart_transformer.dart
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+// 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.
+library mime.multipart_transformer;
+
+import 'dart:async';
+import 'dart:typed_data';
+
+import 'bound_multipart_stream.dart';
+import 'mime_shared.dart';
+import 'char_code.dart';
+
+
+Uint8List _getBoundary(String boundary) {
+  var charCodes = boundary.codeUnits;
+
+  var boundaryList = new Uint8List(4 + charCodes.length);
+  // Set-up the matching boundary preceding it with CRLF and two
+  // dashes.
+  boundaryList[0] = CharCode.CR;
+  boundaryList[1] = CharCode.LF;
+  boundaryList[2] = CharCode.DASH;
+  boundaryList[3] = CharCode.DASH;
+  boundaryList.setRange(4, 4 + charCodes.length, charCodes);
+  return boundaryList;
+}
+
+/**
+ * Parser for MIME multipart types of data as described in RFC 2046
+ * section 5.1.1. The data is transformed into [MimeMultipart] objects, each
+ * of them streaming the multipart data.
+ */
+class MimeMultipartTransformer
+    implements StreamTransformer<List<int>, MimeMultipart> {
+
+  final List<int> _boundary;
+
+  /**
+   * Construct a new MIME multipart parser with the boundary
+   * [boundary]. The boundary should be as specified in the content
+   * type parameter, that is without the -- prefix.
+   */
+  MimeMultipartTransformer(String boundary)
+      : _boundary = _getBoundary(boundary);
+
+  Stream<MimeMultipart> bind(Stream<List<int>> stream) {
+    return new BoundMultipartStream(_boundary, stream).stream;
+  }
+}