Reflect method restriction removal from Fetch API on data URL

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

 if (self.importScripts) {
   importScripts('../resources/fetch-test-helpers.js');
 }
 
 promise_test(function(t) {
     return fetch('http://')
       .then(
         t.unreached_func('fetch of invalid URL must fail'),
         function() {});
   }, 'Fetch invalid URL');
@@ skipping 19 matching lines @@
                         'text/plain;charset=US-ASCII');
           assert_equals(size(response.headers), 1);
           return response.text();
         })
       .then(function(text) {
           assert_equals(text, 'Foobar');
         });
   }, 'fetch data: URL');
 
 promise_test(function(t) {
+    return fetch('data:,Foobar',
+                 {
+                   method: 'POST',
+                   body: 'Test'
+                 })
+      .then(function(response) {
+          assert_equals(response.status, 200);
+          assert_equals(response.statusText, 'OK');
+          assert_equals(response.headers.get('Content-Type'),
+                        'text/plain;charset=US-ASCII');
+          assert_equals(size(response.headers), 1);
+          return response.text();
+        })
+      .then(function(text) {
+          assert_equals(text, 'Foobar');
+        });
+  }, 'fetch data: URL with the POST method');
+
+promise_test(function(t) {
     return fetch('data:text/html;charset=utf-8;base64,5paH5a2X')
       .then(function(response) {
           assert_equals(response.status, 200);
           assert_equals(response.statusText, 'OK');
           assert_equals(response.headers.get('Content-Type'),
                         'text/html;charset=utf-8');
           assert_equals(size(response.headers), 1);
           return response.text();
         })
       .then(function(text) {
@@ skipping 315 matching lines @@
     assert_true(req.bodyUsed);
 }, 'Calling fetch() disturbs body if not null');
 
 test(t => {
     var req = new Request('/', {method: 'POST'});
     fetch(req);
     assert_false(req.bodyUsed);
 }, 'Calling fetch() doesn\'t disturb body if null');
 
 done();