Fix MimeHandlerView plugin loading for data: URLs

chrome/test/data/extensions/api_test/mime_handler_view/embedded.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.
-
-'use strict';
-
-// Tests don't start running until an async call to
-// chrome.mimeHandlerPrivate.getStreamInfo() completes, so queue any messages
-// received until that point.
-var queuedMessages = [];
-
-function queueMessage(event) {
-  queuedMessages.push(event);
-}
-
-window.addEventListener('message', queueMessage, false);
-
-var streamDetails;
-
-function fetchUrl(url) {
-  return new Promise(function(resolve, reject) {
-    var request = new XMLHttpRequest();
-    request.onreadystatechange = function() {
-      if (request.readyState == 4) {
-        resolve({
-          status: request.status,
-          data: request.responseText,
-        });
-      }
-    };
-    request.open('GET', streamDetails.streamUrl, true);
-    request.send();
-  });
-}
-
-function expectSuccessfulRead(response) {
-  chrome.test.assertEq(200, response.status);
-  chrome.test.assertEq('content to read\n', response.data);
-}
-
-function checkStreamDetails(name, embedded) {
-  chrome.test.assertTrue(streamDetails.originalUrl.indexOf(name) != -1);
-  chrome.test.assertEq('text/csv', streamDetails.mimeType);
-  chrome.test.assertTrue(streamDetails.tabId != -1);
-  chrome.test.assertEq(embedded, streamDetails.embedded);
-  chrome.test.assertEq('text/csv',
-                       streamDetails.responseHeaders['Content-Type']);
-}
-
-var tests = [
-  function testBasic() {
-    checkStreamDetails('testBasic.csv', false);
-    fetchUrl(streamDetails.streamUrl)
-        .then(expectSuccessfulRead)
-        .then(chrome.test.succeed);
-  },
-
-  function testEmbedded() {
-    checkStreamDetails('testEmbedded.csv', true);
-    fetchUrl(streamDetails.streamUrl)
-        .then(expectSuccessfulRead)
-        .then(chrome.test.succeed);
-  },
-
-  function testIframe() {
-    checkStreamDetails('testIframe.csv', true);
-    var printMessageArrived = new Promise(function(resolve, reject) {
-      window.addEventListener('message', function(event) {
-        chrome.test.assertEq('print', event.data.type);
-        resolve();
-      }, false);
-    });
-    var contentRead = fetchUrl(streamDetails.streamUrl)
-        .then(expectSuccessfulRead);
-    Promise.all([printMessageArrived, contentRead]).then(chrome.test.succeed);
-  },
-
-  function testAbort() {
-    checkStreamDetails('testAbort.csv', false);
-    chrome.mimeHandlerPrivate.abortStream(function() {
-      fetchUrl(streamDetails.streamUrl).then(function(response) {
-        chrome.test.assertEq(404, response.status);
-        chrome.test.assertEq('', response.data);
-        chrome.test.succeed();
-      });
-    });
-  },
-
-  function testNonAsciiHeaders() {
-    checkStreamDetails('testNonAsciiHeaders.csv', false);
-    chrome.test.assertEq(undefined,
-                         streamDetails.responseHeaders['Content-Disposition']);
-    chrome.test.assertEq(undefined,
-                         streamDetails.responseHeaders['ü']);
-    chrome.test.succeed();
-  },
-
-  function testPostMessage() {
-    var expectedMessages = ['hey', 100, 25.0];
-    var messagesReceived = 0;
-    function handleMessage(event) {
-      if (event.data == 'succeed' &&
-          messagesReceived == expectedMessages.length) {
-        chrome.test.succeed();
-      } else if (event.data == 'fail') {
-        chrome.test.fail();
-      } else if (event.data == expectedMessages[messagesReceived]) {
-        event.source.postMessage(event.data, '*');
-        messagesReceived++;
-      } else {
-        chrome.test.fail('unexpected message ' + event.data);
-      }
-    }
-    window.addEventListener('message', handleMessage, false);
-    while (queuedMessages.length) {
-      handleMessage(queuedMessages.shift());
-    }
-
-  }
-];
-
-var testsByName = {};
-for (let i = 0; i < tests.length; i++) {
-  testsByName[tests[i].name] = tests[i];
-}
-
-chrome.mimeHandlerPrivate.getStreamInfo(function(streamInfo) {
-  if (!streamInfo)
-    return;
-
-  // If the name of the file we're handling matches the name of a test, run that
-  // test.
-  var urlComponents = streamInfo.originalUrl.split('/');
-  var test = urlComponents[urlComponents.length - 1].split('.')[0];
-  streamDetails = streamInfo;
-  if (testsByName[test]) {
-    window.removeEventListener('message', queueMessage);
-    chrome.test.runTests([testsByName[test]]);
-  }
-});