PlzNavigate: properly execute BeforeUnload on renderer initiated navigations

components/test_runner/test_runner_for_specific_view.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 "components/test_runner/test_runner_for_specific_view.h"
 
 #include <stddef.h>
 #include <limits>
 #include <utility>
 
@@ skipping 548 matching lines @@
 }
 
 void TestRunnerForSpecificView::DidLosePointerLockInternal() {
   bool was_locked = pointer_locked_;
   pointer_locked_ = false;
   if (was_locked)
     web_view()->didLosePointerLock();
 }
 
 bool TestRunnerForSpecificView::CallShouldCloseOnWebView() {
-  return web_view()->mainFrame()->dispatchBeforeUnloadEvent();
+  if (!web_view()->mainFrame()->toWebLocalFrame()) {
+    CHECK(false) << "This function cannot be called if the main frame is not a "
+                    "local frame.";
+  }
+
+  return web_view()->mainFrame()->toWebLocalFrame()->dispatchBeforeUnloadEvent(
+      false);
 }
 
 void TestRunnerForSpecificView::SetDomainRelaxationForbiddenForURLScheme(
     bool forbidden,
     const std::string& scheme) {
   web_view()->setDomainRelaxationForbidden(forbidden,
                                            WebString::fromUTF8(scheme));
 }
 
 v8::Local<v8::Value>
@@ skipping 91 matching lines @@
 
 blink::WebView* TestRunnerForSpecificView::web_view() {
   return web_test_proxy_base_->web_view();
 }
 
 WebTestDelegate* TestRunnerForSpecificView::delegate() {
   return web_test_proxy_base_->delegate();
 }
 
 }  // namespace test_runner