Don't commit the blocked URL when a frame is blocked by XFrameOptions.

content/browser/site_per_process_browsertest.cc

Index: content/browser/site_per_process_browsertest.cc
diff --git a/content/browser/site_per_process_browsertest.cc b/content/browser/site_per_process_browsertest.cc
index fd7b06066def8d215a8ee825679436146f3f6ce3..0679637edbe617b0447a2c6f2f37433210b30e4c 100644
--- a/content/browser/site_per_process_browsertest.cc
+++ b/content/browser/site_per_process_browsertest.cc
@@ -6301,6 +6301,11 @@ IN_PROC_BROWSER_TEST_F(SitePerProcessBrowserTest,
     // The blocked frame's origin should become unique.
     EXPECT_EQ("null", root->child_at(0)->current_origin().Serialize());
 
+    // Ensure that we don't use the blocked URL as the blocked frame's last
+    // committed URL (see https://crbug.com/622385).
+    EXPECT_NE(root->child_at(0)->current_frame_host()->GetLastCommittedURL(),
+              blocked_urls[i]);
+
     // The blocked frame should still fire a load event in its parent's process.
     EXPECT_EQ(expected_title, title_watcher.WaitAndGetTitle());