Auto merge of #13561 - mathieuh:request-constructor, r=jdm

Make Request throw less often (fixes #13457)

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---

<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #13457

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- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____

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tests/wpt/metadata/MANIFEST.json

@@ -164191,7 +164191,7 @@
    "testharness"
   ],
   "fetch/api/request/request-error.html": [
-   "bfd03777a43be514a0839ab14f5206f486332fdb",
+   "ff308916884f69b3f4aa8f2017c4d9fe0caf0f00",
    "testharness"
   ],
   "fetch/api/request/request-headers.html": [
@@ -164203,7 +164203,7 @@
    "testharness"
   ],
   "fetch/api/request/request-init-001.sub.html": [
-   "096424b40f6a21e989a6a5d8684b29ee8cbb963e",
+   "49bc4349b4e7a85d88cacd54227355aa986535f1",
    "testharness"
   ],
   "fetch/api/request/request-init-002.html": [

tests/wpt/metadata/fetch/api/request/request-init-001.sub.html.ini

@@ -1,20 +1,10 @@
 [request-init-001.sub.html]
   type: testharness
-  [Check referrer init value of about:client and associated getter]
-    expected: FAIL
-
   [Check referrer init value of  and associated getter]
     expected: FAIL
 
   [Check referrerPolicy init value of  and associated getter]
     expected: FAIL
 
-  [Check referrer init value of http://test.url and associated getter]
-    expected: FAIL
-
   [Check referrerPolicy init value of same-origin and associated getter]
     expected: FAIL
-
-  [Check mode init value of navigate and associated getter]
-    expected: FAIL
-

tests/wpt/metadata/fetch/api/request/request-structure.html.ini

@@ -2,7 +2,3 @@
   type: testharness
   [Request has arrayBuffer method]
     expected: FAIL
-
-  [Check referrer attribute]
-    expected: FAIL
-

tests/wpt/web-platform-tests/fetch/api/request/request-error.html

@@ -26,6 +26,11 @@
           "Expect TypeError exception");
       },"Input URL has credentials");
 
+      test(function() {
+        assert_throws(new TypeError() , function() { new Request("", {"mode" : "navigate"}); },
+          "Expect TypeError exception");
+      },"RequestInit's mode is navigate");
+
       test(function() {
         assert_throws(new TypeError() , function() { new Request("", {"referrer" : "http://:not a valid URL"}); },
           "Expect TypeError exception");

tests/wpt/web-platform-tests/fetch/api/request/request-init-001.sub.html

@@ -49,8 +49,8 @@
                                                   "strict-origin-when-cross-origin"
                                                   ]
       };
-      var modes = {"givenValues" : ["same-origin", "no-cors", "cors", "navigate"],
-                   "expectedValues" : ["same-origin", "no-cors", "cors", "same-origin"]
+      var modes = {"givenValues" : ["same-origin", "no-cors", "cors"],
+                   "expectedValues" : ["same-origin", "no-cors", "cors"]
       };
       var credentials = {"givenValues" : ["omit", "same-origin", "include"],
                           "expectedValues" : ["omit", "same-origin", "include"]