Revert of [BlobStorage] Implementing disk.

content/test/data/blob_storage/common.js

-// 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.
-
-function debug(message) {
-  var span = document.createElement("span");
-  span.appendChild(document.createTextNode(message));
-  span.appendChild(document.createElement("br"));
-  document.getElementById('status').appendChild(span);
-}
-
-function done(message) {
-  if (document.location.hash == '#fail')
-    return;
-  if (message)
-    debug('PASS: ' + message);
-  else
-    debug('PASS');
-  document.location.hash = '#pass';
-}
-
-function fail(message) {
-  debug('FAILED: ' + message);
-  document.location.hash = '#fail';
-}
-
-function getLog() {
-  return "" + document.getElementById('status').innerHTML;
-}
-
-// The following functions are based on
-// WebKit/LayoutTests/fast/js/resources/js-test-pre.js
-// so that the tests will look similar to the existing layout tests.
-function stringify(v) {
-  if (v === 0 && 1/v < 0)
-    return "-0";
-  else return "" + v;
-}
-
-function areArraysEqual(a, b) {
-  try {
-    if (a.length !== b.length)
-      return false;
-    for (var i = 0; i < a.length; i++) {
-      if (a[i] !== b[i])
-        return false;
-    }
-  } catch (ex) {
-    return false;
-  }
-  return true;
-}
-
-function isResultCorrect(_actual, _expected)
-{
-  if (_expected === 0)
-    return _actual === _expected && (1/_actual) === (1/_expected);
-  if (_actual === _expected)
-    return true;
-  if (typeof(_expected) == "number" && isNaN(_expected))
-    return typeof(_actual) == "number" && isNaN(_actual);
-  if (Object.prototype.toString.call(_expected) ==
-      Object.prototype.toString.call([]))
-    return areArraysEqual(_actual, _expected);
-  return false;
-}
-
-function shouldBe(_a, _b)
-{
-  if (typeof _a != "string" || typeof _b != "string")
-    debug("WARN: shouldBe() expects string arguments");
-  var exception;
-  var _av;
-  try {
-    _av = eval(_a);
-  } catch (e) {
-    exception = e;
-  }
-  var _bv = eval(_b);
-
-  if (exception)
-    fail(_a + " should be " + _bv + ". Threw exception " + exception);
-  else if (isResultCorrect(_av, _bv))
-    debug(_a + " is " + _b);
-  else if (typeof(_av) == typeof(_bv))
-    fail(_a + " should be " + _bv + ". Was " + stringify(_av) + ".");
-  else
-    fail(_a + " should be " + _bv + " (of type " + typeof _bv + "). " +
-         "Was " + _av + " (of type " + typeof _av + ").");
-}
-
-function shouldBeTrue(_a) { shouldBe(_a, "true"); }
-function shouldBeFalse(_a) { shouldBe(_a, "false"); }
-function shouldBeNaN(_a) { shouldBe(_a, "NaN"); }
-function shouldBeNull(_a) { shouldBe(_a, "null"); }
-function shouldBeEqualToString(a, b) {
-  var unevaledString = '"' + b.replace(/\\/g, "\\\\").replace(/"/g, "\"") + '"';
-  shouldBe(a, unevaledString);
-}
-
-if (typeof String.prototype.startsWith !== 'function') {
-  String.prototype.startsWith = function (str) {
-    return this.indexOf(str) === 0;
-  };
-}