Implement request's redirect mode and RequestRedirect for Fetch

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

Index: LayoutTests/http/tests/fetch/script-tests/request.js
diff --git a/LayoutTests/http/tests/fetch/script-tests/request.js b/LayoutTests/http/tests/fetch/script-tests/request.js
index 44ef797bf80e9f255a731fae91c734315fbbf0ce..3af08e837cc097bd8dc5c07c773ee1a351850cd0 100644
--- a/LayoutTests/http/tests/fetch/script-tests/request.js
+++ b/LayoutTests/http/tests/fetch/script-tests/request.js
@@ -616,4 +616,29 @@ test(function() {
                   'for synthetic Request object');
   }, 'RequestContext of a synthetic Request object');
 
+// Tests for requests redirect mode.
+test(function() {
+    var request1 = {};
+    var REDIRECT = ['follow', 'error'];
+    REDIRECT.forEach(function(redirect1) {
+        var init1 = {};
+        init1['redirect'] = redirect1;
+        request1 = new Request(URL, init1);
+        assert_equals(request1.redirect, redirect1 || 'follow',

[yhirano, 2015/05/25 06:30:52]

What does this "redirect1 || 'follow'" mean?

[shiva.jm, 2015/05/25 12:01:57]

Done.

+                      'Request.redirect should match');
+        request1 = new Request(request1);
+        assert_equals(request1.redirect, redirect1 || 'follow',

[yhirano, 2015/05/25 06:30:52]

ditto

[shiva.jm, 2015/05/25 12:01:56]

Done.

+                      'Request.redirect should match');
+      });
+  }, 'Request redirect mode test');
+
+test(function() {
+    assert_throws(
+      {name: 'TypeError'},
+      function() {
+        new Request('http://localhost/',{method: 'POST', redirect: 'manual'});
+      },
+      'new Request with manual redirect mode should throw');
+
+  }, 'Request redirect with manual mode test');
 done();