Initiate redirect fetching iff the request has a location

Without this checking, we will run into a TIMEOUT request because
http_redirect_fetch will return immediately when location doesn't exist.

components/constellation/network_listener.rs

@@ -7,7 +7,7 @@
 //! response is received, it is forwarded to the appropriate script thread.
 
 use crossbeam_channel::Sender;
-use http::header::LOCATION;
+use http::HeaderMap;
 use ipc_channel::ipc;
 use ipc_channel::router::ROUTER;
 use msg::constellation_msg::PipelineId;
@@ -98,8 +98,12 @@ impl NetworkListener {
                     FetchMetadata::Unfiltered(ref m) => m,
                 };
 
-                match metadata.headers {
-                    Some(ref headers) if headers.contains_key(LOCATION) => {
+                match metadata.location_url {
+                    // https://html.spec.whatwg.org/multipage/#process-a-navigate-fetch
+                    // Step 7-4.
+                    Some(Ok(ref location_url))
+                        if matches!(location_url.scheme(), "http" | "https") =>
+                    {
                         if self.request_builder.url_list.is_empty() {
                             self.request_builder
                                 .url_list
@@ -115,10 +119,16 @@ impl NetworkListener {
                             .map(|referrer_url| Referrer::ReferrerUrl(referrer_url));
                         self.request_builder.referrer_policy = metadata.referrer_policy;
 
+                        let headers = if let Some(ref headers) = metadata.headers {
+                            headers.clone().into_inner()
+                        } else {
+                            HeaderMap::new()
+                        };
+
                         self.res_init = Some(ResponseInit {
                             url: metadata.final_url.clone(),
                             location_url: metadata.location_url.clone(),
-                            headers: headers.clone().into_inner(),
+                            headers,
                             referrer: metadata.referrer.clone(),
                             status_code: metadata
                                 .status
@@ -132,7 +142,7 @@ impl NetworkListener {
                         //
                         // Ideally the Fetch code would handle manual redirects on its own
                         self.initiate_fetch(None);
-                    },
+                    }
                     _ => {
                         // Response should be processed by script thread.
                         self.should_send = true;

tests/wpt/metadata/cookies/http-state/domain-tests.html.ini

@@ -1,2 +1,67 @@
 [domain-tests.html]
-  expected: TIMEOUT
+  [domain0036 - domain0036]
+    expected: FAIL
+
+  [domain0035 - domain0035]
+    expected: FAIL
+
+  [domain0029 - domain0029]
+    expected: FAIL
+
+  [domain0022 - domain0022]
+    expected: FAIL
+
+  [domain0005 - domain0005]
+    expected: FAIL
+
+  [optional-domain0041 - optional-domain0041]
+    expected: FAIL
+
+  [domain0003 - domain0003]
+    expected: FAIL
+
+  [domain0019 - domain0019]
+    expected: FAIL
+
+  [domain0040 - domain0040]
+    expected: FAIL
+
+  [domain0025 - domain0025]
+    expected: FAIL
+
+  [domain0020 - domain0020]
+    expected: FAIL
+
+  [domain0001 - domain0001]
+    expected: FAIL
+
+  [domain0038 - domain0038]
+    expected: FAIL
+
+  [domain0039 - domain0039]
+    expected: FAIL
+
+  [domain0033 - domain0033]
+    expected: FAIL
+
+  [domain0031 - domain0031]
+    expected: FAIL
+
+  [domain0023 - domain0023]
+    expected: FAIL
+
+  [domain0012 - domain0012]
+    expected: FAIL
+
+  [domain0008 - domain0008]
+    expected: FAIL
+
+  [domain0009 - domain0009]
+    expected: FAIL
+
+  [domain0026 - domain0026]
+    expected: FAIL
+
+  [domain0004 - domain0004]
+    expected: FAIL
+

tests/wpt/metadata/cookies/http-state/ordering-tests.html.ini

@@ -1,2 +1,4 @@
 [ordering-tests.html]
-  expected: TIMEOUT
+  [ordering0001 - ordering0001]
+    expected: FAIL
+

tests/wpt/metadata/cookies/http-state/path-tests.html.ini

@@ -1,2 +1,40 @@
 [path-tests.html]
-  expected: TIMEOUT
+  [path0015 - path0015]
+    expected: FAIL
+
+  [path0002 - path0002]
+    expected: FAIL
+
+  [path0003 - path0003]
+    expected: FAIL
+
+  [path0004 - path0004]
+    expected: FAIL
+
+  [path0001 - path0001]
+    expected: FAIL
+
+  [path0016 - path0016]
+    expected: FAIL
+
+  [path0026 - path0026]
+    expected: FAIL
+
+  [path0017 - path0017]
+    expected: FAIL
+
+  [path0032 - path0032]
+    expected: FAIL
+
+  [path0029 - path0029]
+    expected: FAIL
+
+  [disabled-path0029 - disabled-path0029]
+    expected: FAIL
+
+  [path0010 - path0010]
+    expected: FAIL
+
+  [path0007 - path0007]
+    expected: FAIL
+