Bluetooth: Make maximum possible name filter 248 bytes, not 240

third_party/WebKit/LayoutTests/bluetooth/requestDevice/canonicalizeFilter/unicode-max-length-for-device-name-namePrefix.html

Index: third_party/WebKit/LayoutTests/bluetooth/requestDevice/canonicalizeFilter/unicode-max-length-for-device-name-namePrefix.html
diff --git a/third_party/WebKit/LayoutTests/bluetooth/requestDevice/canonicalizeFilter/unicode-max-length-for-device-name-namePrefix.html b/third_party/WebKit/LayoutTests/bluetooth/requestDevice/canonicalizeFilter/unicode-max-length-for-device-name-namePrefix.html
index b36651436c90c00e44ec2e067bc434a18d336145..9fc02e71ec8dc901e62689df1616a97e4efde7f3 100644
--- a/third_party/WebKit/LayoutTests/bluetooth/requestDevice/canonicalizeFilter/unicode-max-length-for-device-name-namePrefix.html
+++ b/third_party/WebKit/LayoutTests/bluetooth/requestDevice/canonicalizeFilter/unicode-max-length-for-device-name-namePrefix.html
@@ -5,16 +5,14 @@
 <script>
 promise_test(() => {
   // \u2764's UTF-8 respresentation is 3 bytes long.
-  // 81 chars * 3 bytes/char = 243 bytes
-  let unicode_name = generate_string(81, '\u2764');
+  // 83 chars * 3 bytes/char = 249 bytes
+  let unicode_name = generate_string(83, '\u2764');
   return assert_promise_rejects_with_message(
     requestDeviceWithKeyDown({filters: [{namePrefix: unicode_name}]}),
     new DOMException(
       'Failed to execute \'requestDevice\' on \'Bluetooth\': ' +
-      'A \'name\' or \'namePrefix\' longer than 240 bytes ' +
-      'results in no devices being found, because a device can\'t ' +
-      'acquire a name longer than 240 bytes.',
-    'NotFoundError'));
-}, 'Unicode string with utf8 representation between (240, 248] bytes in ' +
+      'A device name can\'t be longer than 248 bytes.',
+    'TypeError'));
+}, 'Unicode string with utf8 representation longer than 248 bytes in ' +
    '\'namePrefix\' must throw NotFoundError.');
 </script>