Convert dart_utils.js to input_sdk/lib/_internal/utils.dart (#310)

lib/runtime/dart_utils.js

Index: lib/runtime/dart_utils.js
diff --git a/lib/runtime/dart_utils.js b/lib/runtime/dart_utils.js
deleted file mode 100644
index a7490b9df544087634dcb8f9b30486aa2a19098a..0000000000000000000000000000000000000000
--- a/lib/runtime/dart_utils.js
+++ /dev/null
@@ -1,133 +0,0 @@
-// Copyright (c) 2015, 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.
-
-/* This library defines a set of general javascript utilities for us
- * by the Dart runtime.
-*/
-
-var dart_utils =
-  typeof module != "undefined" && module.exports || {};
-
-(function (dart_utils) {
-  'use strict';
-
-  const defineProperty = Object.defineProperty;
-  const getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
-  const getOwnPropertyNames = Object.getOwnPropertyNames;
-  const getOwnPropertySymbols = Object.getOwnPropertySymbols;
-
-  const hasOwnProperty = Object.prototype.hasOwnProperty;
-
-  class StrongModeError extends Error {
-    constructor(message) {
-      super(message);
-    }
-  }
-
-  /** This error indicates a strong mode specific failure.
-   */
-  function throwStrongModeError(message) {
-    throw new StrongModeError(message);
-  }
-  dart_utils.throwStrongModeError = throwStrongModeError;
-
-  /** This error indicates a bug in the runtime or the compiler.
-   */
-  function throwInternalError(message) {
-    throw Error(message);
-  }
-  dart_utils.throwInternalError = throwInternalError;
-
-  function assert(condition) {
-    if (!condition) throwInternalError("The compiler is broken: failed assert");
-  }
-  dart_utils.assert = assert;
-
-  function getOwnNamesAndSymbols(obj) {
-    return getOwnPropertyNames(obj).concat(getOwnPropertySymbols(obj));
-  }
-  dart_utils.getOwnNamesAndSymbols = getOwnNamesAndSymbols;
-
-  function safeGetOwnProperty(obj, name) {
-    let desc = getOwnPropertyDescriptor(obj, name);
-    if (desc) return desc.value;
-  }
-  dart_utils.safeGetOwnProperty = safeGetOwnProperty;
-
-  /**
-   * Defines a lazy property.
-   * After initial get or set, it will replace itself with a value property.
-   */
-  // TODO(jmesserly): reusing descriptor objects has been shown to improve
-  // performance in other projects (e.g. webcomponents.js ShadowDOM polyfill).
-  function defineLazyProperty(to, name, desc) {
-    let init = desc.get;
-    let value = null;
-
-    function lazySetter(x) {
-      init = null;
-      value = x;
-    }
-    function circularInitError() {
-      throwInternalError('circular initialization for field ' + name);
-    }
-    function lazyGetter() {
-      if (init == null) return value;
-
-      // Compute and store the value, guarding against reentry.
-      let f = init;
-      init = circularInitError;
-      lazySetter(f());
-      return value;
-    }
-    desc.get = lazyGetter;
-    desc.configurable = true;
-    if (desc.set) desc.set = lazySetter;
-    return defineProperty(to, name, desc);
-  }
-  dart_utils.defineLazyProperty = defineLazyProperty;
-
-  function defineLazy(to, from) {
-    for (let name of getOwnNamesAndSymbols(from)) {
-      defineLazyProperty(to, name, getOwnPropertyDescriptor(from, name));
-    }
-  }
-  dart_utils.defineLazy = defineLazy;
-
-  function defineMemoizedGetter(obj, name, getter) {
-    return defineLazyProperty(obj, name, {get: getter});
-  }
-  dart_utils.defineMemoizedGetter = defineMemoizedGetter;
-
-  function copyTheseProperties(to, from, names) {
-    for (let name of names) {
-      defineProperty(to, name, getOwnPropertyDescriptor(from, name));
-    }
-    return to;
-  }
-  dart_utils.copyTheseProperties = copyTheseProperties;
-
-  /**
-   * Copy properties from source to destination object.
-   * This operation is commonly called `mixin` in JS.
-   */
-  function copyProperties(to, from) {
-    return copyTheseProperties(to, from, getOwnNamesAndSymbols(from));
-  }
-  dart_utils.copyProperties = copyProperties;
-
-  /** Exports from one Dart module to another. */
-  function export_(to, from, show, hide) {
-    if (show == void 0) {
-      show = getOwnNamesAndSymbols(from);
-    }
-    if (hide != void 0) {
-      var hideMap = new Set(hide);
-      show = show.filter((k) => !hideMap.has(k));
-    }
-    return copyTheseProperties(to, from, show);
-  }
-  dart_utils.export = export_;
-
-})(dart_utils);