Cleanups in the Mojo package.

mojo/dart/packages/mojo/sdk_ext/src/constants.dart

Index: mojo/dart/packages/mojo/sdk_ext/src/constants.dart
diff --git a/mojo/dart/packages/mojo/sdk_ext/src/constants.dart b/mojo/dart/packages/mojo/sdk_ext/src/constants.dart
new file mode 100644
index 0000000000000000000000000000000000000000..4341b0f8e1fe602cc84a3fabc8bc093230d61027
--- /dev/null
+++ b/mojo/dart/packages/mojo/sdk_ext/src/constants.dart
@@ -0,0 +1,62 @@
+// 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.
+
+part of internal;
+
+/// Constants that have to be kept in sync with the Mojo C API.
+///
+/// These constants are located in:
+/// [https://github.com/domokit/mojo/blob/master/mojo/public/c/system/types.h](),
+/// [https://github.com/domokit/mojo/blob/master/mojo/public/c/system/data_pipe.h](),
+/// and
+/// [https://github.com/domokit/mojo/blob/master/mojo/public/c/system/message_pipe.h]().
+class MojoConstants {
+  // MojoResult:
+  static const int kOk = 0;
+  static const int kCancelled = 1;
+  static const int kUnknown = 2;
+  static const int kInvalidArgument = 3;
+  static const int kDeadlineExceeded = 4;
+  static const int kNotFound = 5;
+  static const int kAlreadyExists = 6;
+  static const int kPermissionDenied = 7;
+  static const int kResourceExhausted = 8;
+  static const int kFailedPrecondition = 9;
+  static const int kAborted = 10;
+  static const int kOutOfRange = 11;
+  static const int kUnimplemented = 12;
+  static const int kInternal = 13;
+  static const int kUnavailable = 14;
+  static const int kDataLoss = 15;
+  static const int kBusy = 16;
+  static const int kShouldWait = 17;
+
+  // Shared constant for "no flag or signal".
+  static const int kNone = 0;
+
+  // Endpoint Read Flags:
+  static const int kMayDiscard = 1;
+
+  // DataPipeProducer and Consumer:
+  static const int kAllOrNone = 1 << 0;
+
+  // DataPipeConsumer:
+  static const int kDiscard = 1 << 1;
+  static const int kQuery = 1 << 2;
+  static const int kPeek = 1 << 3;
+
+  // DataPipe:
+  static const int kDefaultPipeElementSize = 1;
+  static const int kDefaultPipeCapacity = 0;
+
+  // Handle Signals:
+  static const int kReadable = 0x1;
+  static const int kWritable = 0x2;
+  static const int kPeerClosed = 0x4;
+  static const int kHandleSignalBitfieldSize = 3;
+
+  // Handle:
+  static const int kInvalidHandleToken = 0;
+  static const int kDeadlineIndefinite = -1;
+}