Introduce Response.redirected attribute and add LayoutTest.

https://codereview.chromium.org/2516353002/ introduces URL list of Response.
Response.redirected returns true when the size of the list is larger than 1.

BUG=658249

Review-Url: https://codereview.chromium.org/2524703002
Cr-Commit-Position: refs/heads/master@{#437555}

third_party/WebKit/LayoutTests/http/tests/fetch/resources/thorough-util.js

@@ -65,6 +65,14 @@ var checkFetchResponseType = function(type, url, data) {
                 type,
                 'type must match. url: ' + url);
 };
+var checkFetchResponseRedirected = function(expected, url, data) {
+  assert_equals(data.fetchResult,
+                'resolved',
+                'fetchResult must be resolved. url = ' + url);
+  assert_equals(data.redirected,
+                expected,
+                url + ' redirected flag should match');
+};
 var checkURLList = function(redirectedURLList, url, data) {
   if (!self.internals)
     return;
@@ -102,6 +110,8 @@ var noServerHeader =
 var typeBasic = checkFetchResponseType.bind(this, 'basic');
 var typeCors = checkFetchResponseType.bind(this, 'cors');
 var typeOpaque = checkFetchResponseType.bind(this, 'opaque');
+var responseRedirected = checkFetchResponseRedirected.bind(this, true);
+var responseNotRedirected = checkFetchResponseRedirected.bind(this, false);
 
 // Functions to check the result of JSONP which is evaluated in
 // thorough-iframe.html by appending <script> element.
@@ -365,6 +375,7 @@ function doFetch(request) {
                   status: response.status,
                   headers: headersToArray(response.headers),
                   type: response.type,
+                  redirected: response.redirected,
                   urlList: self.internals ?
                            self.internals.getInternalResponseURLList(response) :
                            [],

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/fetch.js

@@ -29,6 +29,7 @@ promise_test(function(t) {
           assert_equals(response.headers.get('Content-Type'),
                         'text/plain;charset=US-ASCII');
           assert_equals(size(response.headers), 1);
+          assert_false(response.redirected);
           if (self.internals) {
             assert_array_equals(
                 self.internals.getInternalResponseURLList(response),
@@ -68,6 +69,7 @@ promise_test(function(t) {
           assert_equals(response.headers.get('Content-Type'),
                         'text/html;charset=utf-8');
           assert_equals(size(response.headers), 1);
+          assert_false(response.redirected);
           if (self.internals) {
             assert_array_equals(
                 self.internals.getInternalResponseURLList(response),
@@ -99,6 +101,7 @@ if ('createObjectURL' in URL) {
             assert_equals(response.headers.get('Content-Type'), 'text/fox');
             assert_equals(response.headers.get('Content-Length'), '3');
             assert_equals(size(response.headers), 2);
+            assert_false(response.redirected);
             if (self.internals) {
               assert_array_equals(
                   self.internals.getInternalResponseURLList(response), [url]);
@@ -136,6 +139,7 @@ promise_test(function(t) {
       .then(function(response) {
           assert_equals(response.status, 200);
           assert_equals(response.statusText, 'OK');
+          assert_false(response.redirected);
           if (self.internals) {
             assert_array_equals(
                 self.internals.getInternalResponseURLList(response),
@@ -150,6 +154,7 @@ promise_test(function(t) {
       .then(function(response) {
           assert_equals(response.status, 404);
           assert_equals(response.statusText, 'Not Found');
+          assert_false(response.redirected);
           if (self.internals) {
             assert_array_equals(
                 self.internals.getInternalResponseURLList(response),
@@ -176,6 +181,7 @@ promise_test(function(t) {
           // serialized with the exclude fragment flag set, otherwise.
           assert_equals(response.url,
             BASE_ORIGIN + '/fetch/resources/fetch-status.php?status=200');
+          assert_false(response.redirected);
           if (self.internals) {
             assert_array_equals(
                 self.internals.getInternalResponseURLList(response),
@@ -205,6 +211,7 @@ promise_test(function(t) {
             'Response\'s url is locationURL');
           assert_equals(request.url, redirect_original_url,
             'Request\'s url remains the original URL');
+          assert_true(response.redirected);
           if (self.internals) {
             assert_array_equals(
                 self.internals.getInternalResponseURLList(response),
@@ -230,6 +237,7 @@ promise_test(function(t) {
           assert_equals(response.status, 0);
           assert_equals(response.type, 'opaqueredirect');
           assert_equals(response.url, request.url);
+          assert_false(response.redirected);
           if (self.internals) {
             assert_array_equals(
                 self.internals.getInternalResponseURLList(response),
@@ -285,6 +293,7 @@ promise_test(function(test) {
           assert_equals(response.status, 200);
           assert_equals(response.statusText, 'OK');
           assert_equals(response.url, url);
+          assert_false(response.redirected);
           if (self.internals) {
             assert_array_equals(
                 self.internals.getInternalResponseURLList(response), [url]);
@@ -301,6 +310,7 @@ promise_test(function(test) {
           assert_equals(response.status, 200);
           assert_equals(response.statusText, 'OK');
           assert_equals(response.url, url);
+          assert_false(response.redirected);
           if (self.internals) {
             assert_array_equals(
                 self.internals.getInternalResponseURLList(response), [url]);

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/response.js

@@ -18,6 +18,7 @@ test(function() {
     assert_equals(response.type, 'default',
                   'Default Response.type should be \'default\'');
     assert_equals(response.url, '', 'Response.url should be the empty string');
+    assert_false(response.redirected, 'Response.redirected should be false.');
     assert_equals(response.status, 200,
                   'Default Response.status should be 200');
     assert_true(response.ok, 'Default Response.ok must be true');

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/thorough/redirect-loop.js

@@ -16,6 +16,7 @@ var TEST_TARGETS = [
   [REDIRECT_LOOP_URL + encodeURIComponent(BASE_URL) + '&Count=20&mode=cors' +
    '&credentials=same-origin',
    [fetchResolved, hasContentLength, hasBody, typeBasic,
+    responseRedirected,
     checkURLList.bind(
         self,
         createExpectedURLList(
@@ -30,6 +31,7 @@ var TEST_TARGETS = [
   [REDIRECT_LOOP_URL + encodeURIComponent(OTHER_BASE_URL + '&ACAOrigin=*') +
    '&Count=20&mode=cors&credentials=same-origin&method=GET',
    [fetchResolved, noContentLength, noServerHeader, hasBody, typeCors,
+    responseRedirected,
     checkURLList.bind(
         self,
         createExpectedURLList(
@@ -49,6 +51,7 @@ var TEST_TARGETS = [
   [OTHER_REDIRECT_LOOP_URL + encodeURIComponent(BASE_URL + 'ACAOrigin=*') +
    '&Count=20&mode=cors&credentials=same-origin&method=GET&ACAOrigin=*',
    [fetchResolved, noContentLength, noServerHeader, hasBody, typeCors,
+    responseRedirected,
     checkURLList.bind(
         self,
         createExpectedURLList(
@@ -67,6 +70,7 @@ var TEST_TARGETS = [
    encodeURIComponent(OTHER_BASE_URL + 'ACAOrigin=*') +
    '&Count=20&mode=cors&credentials=same-origin&method=GET&ACAOrigin=*',
    [fetchResolved, noContentLength, noServerHeader, hasBody, typeCors,
+    responseRedirected,
     checkURLList.bind(
         self,
         createExpectedURLList(

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/thorough/redirect-nocors.js

@@ -8,14 +8,14 @@ var TEST_TARGETS = [
   [REDIRECT_URL + encodeURIComponent(BASE_URL) +
    '&mode=no-cors&method=GET&headers=CUSTOM',
    [fetchResolved, hasContentLength, hasServerHeader, hasBody, typeBasic,
-    checkURLList.bind(self, [BASE_URL])],
+    responseRedirected, checkURLList.bind(self, [BASE_URL])],
    [methodIsGET, noCustomHeader, authCheck1]],
 
   // Redirect: same origin -> other origin
   [REDIRECT_URL + encodeURIComponent(OTHER_BASE_URL) +
    '&mode=no-cors&method=GET&headers=CUSTOM',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [OTHER_BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [OTHER_BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsGET, noCustomHeader, authCheck2])],
 
   // Status code tests for mode="no-cors"
@@ -23,25 +23,25 @@ var TEST_TARGETS = [
   [REDIRECT_URL + encodeURIComponent(OTHER_BASE_URL) +
    '&mode=no-cors&method=POST&Status=301',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [OTHER_BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [OTHER_BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsGET, authCheck2])],
   // The 302 redirect response changes POST method to GET method.
   [REDIRECT_URL + encodeURIComponent(OTHER_BASE_URL) +
    '&mode=no-cors&method=POST',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [OTHER_BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [OTHER_BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsGET, authCheck2])],
   // GET method must be used for 303 redirect.
   [REDIRECT_URL + encodeURIComponent(OTHER_BASE_URL) +
    '&mode=no-cors&method=POST&Status=303',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [OTHER_BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [OTHER_BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsGET, authCheck2])],
   // The 307 redirect response doesn't change the method.
   [REDIRECT_URL + encodeURIComponent(OTHER_BASE_URL) +
    '&mode=no-cors&method=POST&Status=307',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [OTHER_BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [OTHER_BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsPOST, authCheck2])],
   // The 308 redirect response doesn't change the method.
   // FIXME: disabled due to https://crbug.com/451938
@@ -54,12 +54,12 @@ var TEST_TARGETS = [
   [OTHER_REDIRECT_URL + encodeURIComponent(BASE_URL) +
    '&mode=no-cors&method=GET',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsGET, authCheck1])],
   [OTHER_REDIRECT_URL + encodeURIComponent(BASE_URL) +
    '&mode=no-cors&method=GET&headers=CUSTOM',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsGET, noCustomHeader, authCheck1])],
 
   // Status code tests for mode="no-cors"
@@ -67,25 +67,25 @@ var TEST_TARGETS = [
   [OTHER_REDIRECT_URL + encodeURIComponent(BASE_URL) +
    '&mode=no-cors&method=POST&Status=301',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsGET, authCheck1])],
   // The 302 redirect response MAY change the request method from POST to GET.
   [OTHER_REDIRECT_URL + encodeURIComponent(BASE_URL) +
    '&mode=no-cors&method=POST',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsGET, authCheck1])],
   // GET method must be used for 303 redirect.
   [OTHER_REDIRECT_URL + encodeURIComponent(BASE_URL) +
    '&mode=no-cors&method=POST&Status=303',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsGET, authCheck1])],
   // The 307 redirect response MUST NOT change the method.
   [OTHER_REDIRECT_URL + encodeURIComponent(BASE_URL) +
    '&mode=no-cors&method=POST&Status=307',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsPOST, authCheck1])],
   // The 308 redirect response MUST NOT change the method.
   // FIXME: disabled due to https://crbug.com/451938
@@ -98,7 +98,7 @@ var TEST_TARGETS = [
   [OTHER_REDIRECT_URL + encodeURIComponent(OTHER_BASE_URL) +
    '&mode=no-cors&method=GET',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
-    checkURLList.bind(self, [OTHER_BASE_URL])],
+    responseNotRedirected, checkURLList.bind(self, [OTHER_BASE_URL])],
    onlyOnServiceWorkerProxiedTest([methodIsGET, authCheck2])],
 ];
 

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/thorough/redirect-password.js

@@ -17,32 +17,32 @@ var TEST_TARGETS = [
   [REDIRECT_URL + encodeURIComponent(BASE_URL_WITH_USERNAME) +
    '&mode=same-origin&method=GET',
    [fetchResolved, hasContentLength, hasServerHeader, hasBody, typeBasic,
-    checkURLList.bind(self, [BASE_URL_WITH_USERNAME])],
+    responseRedirected, checkURLList.bind(self, [BASE_URL_WITH_USERNAME])],
    [methodIsGET]],
   [REDIRECT_URL + encodeURIComponent(BASE_URL_WITH_PASSWORD) +
    '&mode=same-origin&method=GET',
    [fetchResolved, hasContentLength, hasServerHeader, hasBody, typeBasic,
-    checkURLList.bind(self, [BASE_URL_WITH_PASSWORD])],
+    responseRedirected, checkURLList.bind(self, [BASE_URL_WITH_PASSWORD])],
    [methodIsGET]],
   [REDIRECT_URL + encodeURIComponent(BASE_URL_WITH_USERNAME) +
    '&mode=cors&method=GET',
    [fetchResolved, hasContentLength, hasServerHeader, hasBody, typeBasic,
-    checkURLList.bind(self, [BASE_URL_WITH_USERNAME])],
+    responseRedirected, checkURLList.bind(self, [BASE_URL_WITH_USERNAME])],
    [methodIsGET]],
   [REDIRECT_URL + encodeURIComponent(BASE_URL_WITH_PASSWORD) +
    '&mode=cors&method=GET',
    [fetchResolved, hasContentLength, hasServerHeader, hasBody, typeBasic,
-    checkURLList.bind(self, [BASE_URL_WITH_PASSWORD])],
+    responseRedirected, checkURLList.bind(self, [BASE_URL_WITH_PASSWORD])],
    [methodIsGET]],
   [REDIRECT_URL + encodeURIComponent(BASE_URL_WITH_USERNAME) +
    '&mode=no-cors&method=GET',
    [fetchResolved, hasContentLength, hasServerHeader, hasBody, typeBasic,
-    checkURLList.bind(self, [BASE_URL_WITH_USERNAME])],
+    responseRedirected, checkURLList.bind(self, [BASE_URL_WITH_USERNAME])],
    [methodIsGET]],
   [REDIRECT_URL + encodeURIComponent(BASE_URL_WITH_PASSWORD) +
    '&mode=no-cors&method=GET',
    [fetchResolved, hasContentLength, hasServerHeader, hasBody, typeBasic,
-    checkURLList.bind(self, [BASE_URL_WITH_PASSWORD])],
+    responseRedirected, checkURLList.bind(self, [BASE_URL_WITH_PASSWORD])],
    [methodIsGET]],
 
   // Origin A -[fetch]-> Origin A -[redirect]-> Origin B
@@ -58,12 +58,14 @@ var TEST_TARGETS = [
    encodeURIComponent(OTHER_BASE_URL_WITH_USERNAME + '&ACAOrigin=*') +
    '&mode=no-cors&method=GET',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
+    responseNotRedirected,
     checkURLList.bind(self, [OTHER_BASE_URL_WITH_USERNAME + '&ACAOrigin=*'])],
    onlyOnServiceWorkerProxiedTest([methodIsGET])],
   [REDIRECT_URL +
    encodeURIComponent(OTHER_BASE_URL_WITH_PASSWORD + '&ACAOrigin=*') +
    '&mode=no-cors&method=GET',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
+    responseNotRedirected,
     checkURLList.bind(self, [OTHER_BASE_URL_WITH_PASSWORD + '&ACAOrigin=*'])],
    onlyOnServiceWorkerProxiedTest([methodIsGET])],
 
@@ -80,12 +82,14 @@ var TEST_TARGETS = [
    encodeURIComponent(BASE_URL_WITH_USERNAME + 'ACAOrigin=*') +
    '&mode=no-cors&method=GET&ACAOrigin=*',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
+    responseNotRedirected,
     checkURLList.bind(self, [BASE_URL_WITH_USERNAME + 'ACAOrigin=*'])],
    onlyOnServiceWorkerProxiedTest([methodIsGET])],
   [OTHER_REDIRECT_URL +
    encodeURIComponent(BASE_URL_WITH_PASSWORD + 'ACAOrigin=*') +
    '&mode=no-cors&method=GET&ACAOrigin=*',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
+    responseNotRedirected,
     checkURLList.bind(self, [BASE_URL_WITH_PASSWORD + 'ACAOrigin=*'])],
    onlyOnServiceWorkerProxiedTest([methodIsGET])],
 
@@ -102,12 +106,14 @@ var TEST_TARGETS = [
    encodeURIComponent(OTHER_BASE_URL_WITH_USERNAME + 'ACAOrigin=*') +
    '&mode=no-cors&method=GET&ACAOrigin=*',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
+    responseNotRedirected,
     checkURLList.bind(self, [OTHER_BASE_URL_WITH_USERNAME + 'ACAOrigin=*'])],
    onlyOnServiceWorkerProxiedTest([methodIsGET])],
   [OTHER_REDIRECT_URL +
    encodeURIComponent(OTHER_BASE_URL_WITH_PASSWORD + 'ACAOrigin=*') +
    '&mode=no-cors&method=GET&ACAOrigin=*',
    [fetchResolved, noContentLength, noServerHeader, noBody, typeOpaque,
+    responseNotRedirected,
     checkURLList.bind(self, [OTHER_BASE_URL_WITH_PASSWORD + 'ACAOrigin=*'])],
    onlyOnServiceWorkerProxiedTest([methodIsGET])],
 ];

third_party/WebKit/LayoutTests/http/tests/serviceworker/redirected-response.html

@@ -9,9 +9,16 @@
 function redirected_test(url,
                          fetch_method,
                          cache,
+                         expected_redirected,
                          expected_url_list) {
   return fetch_method(url).then(response => {
         var cloned_response = response.clone();
+        assert_equals(
+            response.redirected, expected_redirected,
+            'The redirected flag of response must match. URL: ' + url);
+        assert_equals(
+            cloned_response.redirected, expected_redirected,
+            'The redirected flag of cloned response must match. URL: ' + url);
         if (self.internals) {
           assert_array_equals(
               self.internals.getInternalResponseURLList(response),
@@ -26,6 +33,9 @@ function redirected_test(url,
       })
     .then(_ => cache.match(url))
     .then(response => {
+        assert_equals(response.redirected, expected_redirected,
+        'The redirected flag of response in CacheStorage must match. URL: ' +
+        url);
         if (self.internals) {
           assert_array_equals(
               self.internals.getInternalResponseURLList(response),
@@ -62,17 +72,21 @@ promise_test(t => {
           frame = f;
           return Promise.all([
               redirected_test(TARGET_URL, self.fetch, cache,
+                              false /* expected_redirected */,
                               [TARGET_URL]),
               redirected_test(REDIRECT_TO_TARGET_URL, self.fetch, cache,
+                              true /* expected_redirected */,
                               [REDIRECT_TO_TARGET_URL, TARGET_URL]),
               redirected_test('./?url=' + encodeURIComponent(TARGET_URL),
                               frame.contentWindow.fetch,
                               cache,
+                              false /* expected_redirected */,
                               [TARGET_URL]),
               redirected_test(
                   './?url=' + encodeURIComponent(REDIRECT_TO_TARGET_URL),
                   frame.contentWindow.fetch,
                   cache,
+                  true /* expected_redirected */,
                   [REDIRECT_TO_TARGET_URL, TARGET_URL]),
             ]);
         })
@@ -81,5 +95,5 @@ promise_test(t => {
           frame.remove();
           return service_worker_unregister(t, SCOPE);
         });
-  }, 'Verify URL list of responses.');
+  }, 'Verify redirected flag of responses.');
 </script>

third_party/WebKit/LayoutTests/http/tests/serviceworker/webexposed/global-interface-listing-service-worker-expected.txt

@@ -649,6 +649,7 @@ interface Response
     getter bodyUsed
     getter headers
     getter ok
+    getter redirected
     getter status
     getter statusText
     getter type

third_party/WebKit/LayoutTests/platform/win/virtual/stable/webexposed/global-interface-listing-expected.txt

@@ -4126,6 +4126,7 @@ interface Response
     getter bodyUsed
     getter headers
     getter ok
+    getter redirected
     getter status
     getter statusText
     getter type

third_party/WebKit/LayoutTests/virtual/service-worker-navigation-preload/http/tests/serviceworker/webexposed/global-interface-listing-service-worker-expected.txt

@@ -656,6 +656,7 @@ interface Response
     getter bodyUsed
     getter headers
     getter ok
+    getter redirected
     getter status
     getter statusText
     getter type

third_party/WebKit/LayoutTests/virtual/stable/http/tests/serviceworker/webexposed/global-interface-listing-service-worker-expected.txt

@@ -512,6 +512,7 @@ interface Response
     getter bodyUsed
     getter headers
     getter ok
+    getter redirected
     getter status
     getter statusText
     getter type

third_party/WebKit/LayoutTests/virtual/stable/webexposed/global-interface-listing-dedicated-worker-expected.txt

@@ -516,6 +516,7 @@ Starting worker: resources/global-interface-listing.js
 [Worker]     getter bodyUsed
 [Worker]     getter headers
 [Worker]     getter ok
+[Worker]     getter redirected
 [Worker]     getter status
 [Worker]     getter statusText
 [Worker]     getter type

third_party/WebKit/LayoutTests/virtual/stable/webexposed/global-interface-listing-expected.txt

@@ -4184,6 +4184,7 @@ interface Response
     getter bodyUsed
     getter headers
     getter ok
+    getter redirected
     getter status
     getter statusText
     getter type

third_party/WebKit/LayoutTests/virtual/stable/webexposed/global-interface-listing-shared-worker-expected.txt

@@ -511,6 +511,7 @@ Starting worker: resources/global-interface-listing.js
 [Worker]     getter bodyUsed
 [Worker]     getter headers
 [Worker]     getter ok
+[Worker]     getter redirected
 [Worker]     getter status
 [Worker]     getter statusText
 [Worker]     getter type

third_party/WebKit/LayoutTests/webexposed/global-interface-listing-dedicated-worker-expected.txt

@@ -652,6 +652,7 @@ Starting worker: resources/global-interface-listing.js
 [Worker]     getter bodyUsed
 [Worker]     getter headers
 [Worker]     getter ok
+[Worker]     getter redirected
 [Worker]     getter status
 [Worker]     getter statusText
 [Worker]     getter type

third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt

@@ -5052,6 +5052,7 @@ interface Response
     getter bodyUsed
     getter headers
     getter ok
+    getter redirected
     getter status
     getter statusText
     getter type

third_party/WebKit/LayoutTests/webexposed/global-interface-listing-shared-worker-expected.txt

@@ -647,6 +647,7 @@ Starting worker: resources/global-interface-listing.js
 [Worker]     getter bodyUsed
 [Worker]     getter headers
 [Worker]     getter ok
+[Worker]     getter redirected
 [Worker]     getter status
 [Worker]     getter statusText
 [Worker]     getter type

third_party/WebKit/Source/modules/fetch/FetchResponseData.h

@@ -87,6 +87,7 @@ class MODULES_EXPORT FetchResponseData final
   }
 
   void setURLList(const Vector<KURL>&);
+  const Vector<KURL>& urlList() const { return m_urlList; }
   const Vector<KURL>& internalURLList() const;
 
   void setStatus(unsigned short status) { m_status = status; }

third_party/WebKit/Source/modules/fetch/Response.cpp

@@ -364,6 +364,10 @@ String Response::url() const {
   return url;
 }
 
+bool Response::redirected() const {
+  return m_response->urlList().size() > 1;
+}
+
 unsigned short Response::status() const {
   // "The status attribute's getter must return response's status."
   return m_response->status();

third_party/WebKit/Source/modules/fetch/Response.h

@@ -60,6 +60,7 @@ class MODULES_EXPORT Response final : public Body {
   // From Response.idl:
   String type() const;
   String url() const;
+  bool redirected() const;
   unsigned short status() const;
   bool ok() const;
   String statusText() const;

third_party/WebKit/Source/modules/fetch/Response.idl

@@ -20,6 +20,7 @@ enum ResponseType { "basic", "cors", "default", "error", "opaque", "opaqueredire
     [CallWith=ExecutionContext, RaisesException] static Response redirect(USVString url, optional unsigned short status = 302);
     readonly attribute ResponseType type;
     readonly attribute USVString url;
+    readonly attribute boolean redirected;
     readonly attribute unsigned short status;
     readonly attribute boolean ok;
     readonly attribute ByteString statusText;