Missing `contentFrame` after cross-origin navigation with PlzNavigate + site isolation.

content/browser/frame_host/navigation_handle_impl_browsertest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/frame_host/navigation_handle_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/request_context_type.h"
 #include "content/public/test/browser_test_utils.h"
@@ skipping 790 matching lines @@
   EXPECT_EQ(link_url, url_recorder.urls().back());
   EXPECT_EQ(2ul, url_recorder.urls().size());
   EXPECT_EQ(REQUEST_CONTEXT_TYPE_HYPERLINK,
             installer.navigation_throttle()->request_context_type());
 
   // Finishes the last navigation.
   link_manager.WaitForNavigationFinished();
   EXPECT_FALSE(installer.navigation_throttle());
 }
 
+IN_PROC_BROWSER_TEST_F(NavigationHandleImplBrowserTest,
+                       BugBaseline) {
+  const char kChildFrameId[] = "child0";
+  GURL main_url(embedded_test_server()->GetURL(
+      "a.com", "/frame_tree/page_with_one_frame.html"));
+  GURL allowed_subframe_url(embedded_test_server()->GetURL(
+      "a.com", "/title2.html"));
+
+  ASSERT_TRUE(NavigateToURL(shell(), main_url));
+  ASSERT_TRUE(NavigateIframeToURL(shell()->web_contents(), kChildFrameId,
+                                  allowed_subframe_url));
+  const char kScript[] =
+      "let f = document.getElementById(\"%s\");"
+      "window.domAutomationController.send(!!f.contentWindow);";
+  bool has_content_window = 0;
+  EXPECT_TRUE(ExecuteScriptAndExtractBool(
+      shell(), base::StringPrintf(kScript, kChildFrameId),
+      &has_content_window));
+  EXPECT_TRUE(has_content_window);
+}
+
+IN_PROC_BROWSER_TEST_F(NavigationHandleImplBrowserTest,
+                       BugRepro) {
+  const char kChildFrameId[] = "child0";
+  GURL main_url(embedded_test_server()->GetURL(
+      "a.com", "/frame_tree/page_with_one_frame.html"));
+  GURL allowed_subframe_url(embedded_test_server()->GetURL(
+      "a.com", "/cross-site/baz.com/title2.html"));
+
+  ASSERT_TRUE(NavigateToURL(shell(), main_url));
+  ASSERT_TRUE(NavigateIframeToURL(shell()->web_contents(), kChildFrameId,
+                                  allowed_subframe_url));
+  const char kScript[] =
+      "let f = document.getElementById(\"%s\");"
+      "window.domAutomationController.send(!!f.contentWindow);";
+  bool has_content_window = 0;
+  EXPECT_TRUE(ExecuteScriptAndExtractBool(
+      shell(), base::StringPrintf(kScript, kChildFrameId),
+      &has_content_window));
+  EXPECT_TRUE(has_content_window);
+}
+
 // Checks that the RequestContextType value is properly set for an form (POST).
 IN_PROC_BROWSER_TEST_F(NavigationHandleImplBrowserTest,
                        VerifyFormRequestContextType) {
   GURL document_url(
       embedded_test_server()->GetURL("/session_history/form.html"));
   GURL post_url(embedded_test_server()->GetURL("/echotitle"));
 
   TestNavigationThrottleInstaller installer(
       shell()->web_contents(), NavigationThrottle::PROCEED,
       NavigationThrottle::PROCEED, NavigationThrottle::PROCEED);
@@ skipping 77 matching lines @@
 IN_PROC_BROWSER_TEST_F(NavigationHandleImplHttpsUpgradeBrowserTest,
                        StartUrlIsHttpsUpgradedCrossSite) {
   GURL start_url(
       embedded_test_server()->GetURL("/https_upgrade_cross_site.html"));
   GURL cross_site_iframe_secure_url("https://other.com/title1.html");
 
   CheckHttpsUpgradedIframeNavigation(start_url, cross_site_iframe_secure_url);
 }
 
 }  // namespace content