Implement request's redirect mode and RequestRedirect for Fetch

Source/platform/network/ResourceRequestTest.cpp

Index: Source/platform/network/ResourceRequestTest.cpp
diff --git a/Source/platform/network/ResourceRequestTest.cpp b/Source/platform/network/ResourceRequestTest.cpp
index d3bbd1cebed2d3455ea6aa08669b0c944eed9a29..3cb707af77659b75d975bfd75a06563c7577bc6d 100644
--- a/Source/platform/network/ResourceRequestTest.cpp
+++ b/Source/platform/network/ResourceRequestTest.cpp
@@ -40,6 +40,7 @@ TEST(ResourceRequestTest, CrossThreadResourceRequestData)
     original.setRequestorProcessID(40);
     original.setAppCacheHostID(50);
     original.setRequestContext(WebURLRequest::RequestContextAudio);
+    original.setFetchRedirectMode(WebURLRequest::FetchRedirectModeFollow);
     original.setFrameType(WebURLRequest::FrameTypeNested);
     original.setHTTPReferrer(Referrer("http://www.example.com/referrer.htm", ReferrerPolicyDefault));
 
@@ -64,6 +65,7 @@ TEST(ResourceRequestTest, CrossThreadResourceRequestData)
     EXPECT_EQ(40, original.requestorProcessID());
     EXPECT_EQ(50, original.appCacheHostID());
     EXPECT_EQ(WebURLRequest::RequestContextAudio, original.requestContext());
+    EXPECT_EQ(WebURLRequest::FetchRedirectModeFollow, original.fetchRedirectMode());
     EXPECT_EQ(WebURLRequest::FrameTypeNested, original.frameType());
     EXPECT_STREQ("http://www.example.com/referrer.htm", original.httpReferrer().utf8().data());
     EXPECT_EQ(ReferrerPolicyDefault, original.referrerPolicy());