Make sure pages that are closing but not yet closed are still suspended.

third_party/WebKit/Source/web/tests/WebViewTest.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 4202 matching lines @@
       ScopedPageSuspender suspender2;
       EXPECT_TRUE(webView->page()->suspended());
     }
 
     EXPECT_TRUE(webView->page()->suspended());
   }
 
   EXPECT_FALSE(webView->page()->suspended());
 }
 
+TEST_P(WebViewTest, ClosingPageIsSuspended) {
+  WebViewImpl* webView = m_webViewHelper.initialize();
+  Page* page = m_webViewHelper.webView()->page();
+  EXPECT_FALSE(page->suspended());
+
+  webView->setOpenedByDOM();
+
+  LocalFrame* mainFrame = toLocalFrame(page->mainFrame());
+  EXPECT_FALSE(mainFrame->domWindow()->closed());
+
+  mainFrame->domWindow()->close(nullptr);
+  // The window should be marked closed...
+  EXPECT_TRUE(mainFrame->domWindow()->closed());
+  // EXPECT_TRUE(page->isClosing());
+  // ...but not yet detached.
+  EXPECT_TRUE(mainFrame->host());
+
+  {
+    ScopedPageSuspender suspender;
+    EXPECT_TRUE(page->suspended());
+  }
+}
+
 TEST_P(WebViewTest, ForceAndResetViewport) {
   URLTestHelpers::registerMockedURLFromBaseURL(
       WebString::fromUTF8(m_baseURL.c_str()),
       WebString::fromUTF8("200-by-300.html"));
   WebViewImpl* webViewImpl =
       m_webViewHelper.initializeAndLoad(m_baseURL + "200-by-300.html");
   webViewImpl->resize(WebSize(100, 150));
   webViewImpl->layerTreeView()->setViewportSize(WebSize(100, 150));
   VisualViewport* visualViewport =
       &webViewImpl->page()->frameHost().visualViewport();
@@ skipping 122 matching lines @@
       .translate(50, 55)
       .scale(1. / 2.f);
   EXPECT_EQ(expectedMatrix,
             webViewImpl->getDeviceEmulationTransformForTesting());
   // visibleContentRect doesn't change.
   EXPECT_EQ(IntRect(50, 55, 50, 75),
             *devToolsEmulator->visibleContentRectForPainting());
 }
 
 }  // namespace blink