[VizHitTesting] Re-enble a portal unit test due to v2 regression

v2 ignored pointer-events: none for X-origin iframes which made oopif in
a portal hit testable. crrev.com/c/1797092 has addressed this issue.

Bug: 1002228
Change-Id: I6128530c9f0e78462f555b91f3785f1c56fec4f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1818865
Commit-Queue: Yi Gu <yigu@chromium.org>
Reviewed-by: Kevin McNee <mcnee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#698899}

content/browser/portal/portal_browsertest.cc

@@ -609,13 +609,6 @@ IN_PROC_BROWSER_TEST_P(PortalHitTestBrowserTest, DispatchInputEvent) {
 // Tests that input events performed over on OOPIF inside a portal are targeted
 // to the portal's parent.
 IN_PROC_BROWSER_TEST_P(PortalHitTestBrowserTest, NoInputToOOPIFInPortal) {
-  if (features::IsVizHitTestingSurfaceLayerEnabled()) {
-    // TODO(1002228): Enable this test for the VizHitTestSurfaceLayer case once
-    // this issue is fixed.
-    LOG(WARNING) << "Skipping test due to crbug.com/1002228";
-    return;
-  }
-
   EXPECT_TRUE(NavigateToURL(
       shell(), embedded_test_server()->GetURL("portal.test", "/title1.html")));
   WebContentsImpl* web_contents_impl =