Make the fuchsia mojo/public repo the source of truth.

mojo/public/js/unicode.js

-// Copyright 2014 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.
-
-/**
- * Defines functions for translating between JavaScript strings and UTF8 strings
- * stored in ArrayBuffers. There is much room for optimization in this code if
- * it proves necessary.
- */
-define("mojo/public/js/unicode", function() {
-  /**
-   * Decodes the UTF8 string from the given buffer.
-   * @param {ArrayBufferView} buffer The buffer containing UTF8 string data.
-   * @return {string} The corresponding JavaScript string.
-   */
-  function decodeUtf8String(buffer) {
-    return decodeURIComponent(escape(String.fromCharCode.apply(null, buffer)));
-  }
-
-  /**
-   * Encodes the given JavaScript string into UTF8.
-   * @param {string} str The string to encode.
-   * @param {ArrayBufferView} outputBuffer The buffer to contain the result.
-   * Should be pre-allocated to hold enough space. Use |utf8Length| to determine
-   * how much space is required.
-   * @return {number} The number of bytes written to |outputBuffer|.
-   */
-  function encodeUtf8String(str, outputBuffer) {
-    var utf8String = unescape(encodeURIComponent(str));
-    if (outputBuffer.length < utf8String.length)
-      throw new Error("Buffer too small for encodeUtf8String");
-    for (var i = 0; i < outputBuffer.length && i < utf8String.length; i++)
-      outputBuffer[i] = utf8String.charCodeAt(i);
-    return i;
-  }
-
-  /**
-   * Returns the number of bytes that a UTF8 encoding of the JavaScript string
-   * |str| would occupy.
-   */
-  function utf8Length(str) {
-    var utf8String = unescape(encodeURIComponent(str));
-    return utf8String.length;
-  }
-
-  var exports = {};
-  exports.decodeUtf8String = decodeUtf8String;
-  exports.encodeUtf8String = encodeUtf8String;
-  exports.utf8Length = utf8Length;
-  return exports;
-});