Prevent RFH from attempting to transfer after it's been swapped out

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 69e6bb00ee4389af6034528c904326d3063d676f..a0b5b04edd0ff812b06038755f79824ac6f924fd 100644
--- a/content/browser/site_per_process_browsertest.cc
+++ b/content/browser/site_per_process_browsertest.cc
@@ -8230,4 +8230,41 @@ IN_PROC_BROWSER_TEST_F(SitePerProcessBrowserTest, NavigateInUnloadHandler) {
       DepictFrameTree(root));
 }
 
+IN_PROC_BROWSER_TEST_F(SitePerProcessBrowserTest,
+                       RFHTransfersWhilePendingDeletion) {
+  GURL main_url(embedded_test_server()->GetURL("a.com", "/title1.html"));
+  NavigateToURL(shell(), main_url);
+
+  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
+                            ->GetFrameTree()
+                            ->root();
+
+  // Start a cross-process navigation and wait until the response is received.
+  GURL cross_site_url_1 =
+      embedded_test_server()->GetURL("b.com", "/title1.html");
+  TestNavigationManager cross_site_manager(shell()->web_contents(),
+                                           cross_site_url_1);
+  shell()->web_contents()->GetController().LoadURL(
+      cross_site_url_1, Referrer(), ui::PAGE_TRANSITION_LINK, std::string());
+  EXPECT_TRUE(cross_site_manager.WaitForWillProcessResponse());
+
+  // Start a renderer-initiated navigation to a cross-process url and make sure
+  // the navigation will be blocked before being transferred.
+  GURL cross_site_url_2 =
+      embedded_test_server()->GetURL("c.com", "/title1.html");
+  TestNavigationManager same_site_manager(shell()->web_contents(),
+                                          cross_site_url_2);
+  EXPECT_TRUE(ExecuteScript(
+      root, "location.href = '" + cross_site_url_2.spec() + "';"));
+  EXPECT_TRUE(same_site_manager.WaitForWillProcessResponse());
+
+  // Now have the cross-process navigation commit and mark the current RFH as
+  // pending deletion.
+  cross_site_manager.WaitForNavigationFinished();
+
+  // Resume the navigation in the previous RFH that has just been marked as
+  // pending deletion. We should not crash.
+  same_site_manager.WaitForNavigationFinished();
+}
+
 }  // namespace content