Normalize and update the header value checks to RFC 7230 for Fetch

LayoutTests/http/tests/fetch/resources/fetch-test-helpers.js

 if (self.importScripts) {
   importScripts('/resources/testharness.js');
   importScripts('/resources/testharness-helpers.js');
   importScripts('/serviceworker/resources/test-helpers.js');
   importScripts('/fetch/resources/fetch-test-options.js');
 }
 
 function getContentType(headers) {
   var content_type = '';
   for (var header of headers) {
@@ skipping 61 matching lines @@
 // - "Content-Type" (CONTENT_TYPE): This can be
 //   a simple header if the header value is in SIMPLE_HEADER_CONTENT_TYPE_VALUES
 //   or not if the header value is in NON_SIMPLE_HEADER_CONTENT_TYPE_VALUES.
 // - others (NON_SIMPLE_HEADER_NAMES)
 
 // A header name must match token in RFC 2616.
 // Fetch API Spec: https://fetch.spec.whatwg.org/#concept-header-name
 var INVALID_HEADER_NAMES = INVALID_TOKENS;
 var INVALID_HEADER_VALUES = [
   'test \r data', 'test \n data', 'test \0 data',
-  'test\r\n data',
-  'test\r', 'test\n', 'test\r\n', 'test\0',
-  '\0'.repeat(100000), '\r\n'.repeat(50000), 'x'.repeat(100000) + '\0'];
+  'test\r\n data', 'test\0', '', ' ', '\x7f', 't\bt', 't\vt',

[hiroshige, 2015/09/09 07:01:48]

'', ' ', and '\r\n'.repeat(50000) will be valid.

Also, how about adding tests for all rejected octets, i.e.
'\x01', ..., '\x08', '\x0b', '\x0c', '\x0e', ..., '\x1f'?

[shiva.jm, 2015/09/10 10:10:26]

Done.

+  '\0'.repeat(100000), '\r\n'.repeat(50000),
+  '\u3042', 'x'.repeat(100000) + '\0'];
 
 var FORBIDDEN_HEADER_NAMES =
   ['Accept-Charset', 'Accept-Encoding', 'Access-Control-Request-Headers',
    'Access-Control-Request-Method', 'Connection', 'Content-Length',
    'Cookie', 'Cookie2', 'Date', 'DNT', 'Expect', 'Host', 'Keep-Alive',
    'Origin', 'Referer', 'TE', 'Trailer', 'Transfer-Encoding', 'Upgrade',
    'User-Agent', 'Via', 'Proxy-', 'Sec-', 'Proxy-FooBar', 'Sec-FooBar'];
 var FORBIDDEN_RESPONSE_HEADER_NAMES =
   ['Set-Cookie', 'Set-Cookie2',
    'set-cookie', 'set-cookie2',
@@ skipping 114 matching lines @@
                 function() {
                   if (mode !== 'same-origin') {
                     assert_unreached(
                       'Test 5: Cross-origin HTTPS request must success: ' +
                       'mode = ' + mode);
                   }
                 });
           });
     }, 'Block fetch() as mixed content (' + mode + ')');
 }