Revert of Teach HistoryItem about a request's initiator.

third_party/WebKit/LayoutTests/http/tests/cookies/same-site/popup-cross-site-post.html

Index: third_party/WebKit/LayoutTests/http/tests/cookies/same-site/popup-cross-site-post.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/cookies/same-site/popup-cross-site-post.html b/third_party/WebKit/LayoutTests/http/tests/cookies/same-site/popup-cross-site-post.html
index eecc978e1b6d59e991534c69f2805852d8c1fff2..ec32a8947c3e644eb80c6a169c8822996ce7d433 100644
--- a/third_party/WebKit/LayoutTests/http/tests/cookies/same-site/popup-cross-site-post.html
+++ b/third_party/WebKit/LayoutTests/http/tests/cookies/same-site/popup-cross-site-post.html
@@ -15,21 +15,13 @@
     window.location.hostname = TEST_HOST;
 } else {
     async_test(t => {
-        triggeredReload = false;
         window.addEventListener("message", t.step_func_done(e => {
             assert_equals(e.data.http[STRICT_DOM], undefined, "strict");
             assert_equals(e.data.http[LAX_DOM], undefined, "lax");
             assert_equals(e.data.http[NORMAL_DOM], "1", "normal");
             // TODO(mkwst): This should exclude the samesite cookies.
             assert_equals(e.data.document, STRICT_DOM + "=1; " + LAX_DOM + "=1; " + NORMAL_DOM + "=1");
-
-            if (triggeredReload) {
-              e.source.close();
-              t.done();
-            } else {
-              triggeredReload = true;
-              e.source.postMessage("reload", "*");
-            }
+            e.source.close();
         }));
 
         var f = document.createElement('form');