Run unload handlers when navigating to about:blank using PlzNavigate.

content/test/test_render_frame_host.cc

 // Copyright 2013 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/test/test_render_frame_host.h"
 
 #include "base/guid.h"
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/navigation_handle_impl.h"
 #include "content/browser/frame_host/navigation_request.h"
@@ skipping 407 matching lines @@
   if (!IsBrowserSideNavigationEnabled()) {
     // Non PlzNavigate
     if (is_waiting_for_beforeunload_ack())
       SendBeforeUnloadACK(true);
     return;
   }
 
   // PlzNavigate
   NavigationRequest* request = frame_tree_node_->navigation_request();
   CHECK(request);
+  bool have_to_make_network_request = ShouldMakeNetworkRequestForURL(
+      request->common_params().url);
 
   // Simulate a beforeUnload ACK from the renderer if the browser is waiting for
   // it. If it runs it will update the request state.
   if (request->state() == NavigationRequest::WAITING_FOR_RENDERER_RESPONSE) {
     static_cast<TestRenderFrameHost*>(frame_tree_node()->current_frame_host())
         ->SendBeforeUnloadACK(true);
   }
 
+  if (!have_to_make_network_request)
+    return;  // |request| is destructed by now.
+
   CHECK(request->state() == NavigationRequest::STARTED);
 
   TestNavigationURLLoader* url_loader =
       static_cast<TestNavigationURLLoader*>(request->loader_for_testing());
   CHECK(url_loader);
 
   // If a non-empty |redirect_url| was provided, simulate a server redirect.
   if (!redirect_url.is_empty())
     url_loader->SimulateServerRedirect(redirect_url);
 
@@ skipping 39 matching lines @@
   // PlzNavigate: NavigationHandle::WillStartRequest has already been called at
   // this point.
   if (!navigation_handle() || IsBrowserSideNavigationEnabled())
     return;
   navigation_handle()->CallWillStartRequestForTesting(
       false /* is_post */, Referrer(GURL(), blink::WebReferrerPolicyDefault),
       true /* user_gesture */, transition, false /* is_external_protocol */);
 }
 
 }  // namespace content