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

LayoutTests/http/tests/fetch/script-tests/headers.js

Index: LayoutTests/http/tests/fetch/script-tests/headers.js
diff --git a/LayoutTests/http/tests/fetch/script-tests/headers.js b/LayoutTests/http/tests/fetch/script-tests/headers.js
index 4dd6037237a186f84604b764124bd4815f2e63bb..e8d450f302330d2f1a66722ce370e6a34a9eb778 100644
--- a/LayoutTests/http/tests/fetch/script-tests/headers.js
+++ b/LayoutTests/http/tests/fetch/script-tests/headers.js
@@ -176,6 +176,31 @@ test(function() {
     assert_equals(headers.get('a'), 'b');
     assert_equals(headers.get('c'), 'd');
 
+    // new valid Headers values
+    headers = new Headers();
+    headers.set('a', '\xd0\xa1');
+    assert_equals(headers.get('a'), '\xd0\xa1');
+    headers.append('b', 't t');
+    assert_equals(headers.get('b'), 't t');
+    headers.append('c', 't\tt');
+    assert_equals(headers.get('c'), 't\tt');
+
+    // test for removing leading and trailing white spaces

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

nit: How about "Tests for normalizing header values."?
- s/test/Tests/
- Add a period at the end of the statement.
- Including the word of "normalize" or so will help readers to correspond the
tests with the spec.

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

Done.

+    headers.append('d', ' t');
+    assert_equals(headers.get('d'), 't');
+    headers.set('e', 't ');
+    assert_equals(headers.get('d'), 't');
+    headers.append('f', ' t ');
+    assert_equals(headers.get('f'), 't');
+    headers.append('g', 'test\r');
+    assert_equals(headers.get('g'), 'test');
+    headers.set('h', 'test\n');
+    assert_equals(headers.get('h'), 'test');
+    headers.append('i', 'test\r\n');
+    assert_equals(headers.get('i'), 'test');
+    headers.append('j', 'test\t');
+    assert_equals(headers.get('j'), 'test');
+
     // Throw errors
     INVALID_HEADER_NAMES.forEach(function(name) {
         assert_throws({name: 'TypeError'},