Ignore non-ASCII headers in the mimeHandlerPrivate API.

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 = [];
@@ skipping 68 matching lines @@
     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]) {
@@ skipping 23 matching lines @@
   // 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]]);
   }
 });