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

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

Index: third_party/WebKit/Source/web/tests/WebViewTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/WebViewTest.cpp b/third_party/WebKit/Source/web/tests/WebViewTest.cpp
index c0258ffea3528dc98818208be8287cea9124c381..0b681365b6483499f7a792a2c6db2bb44fe85dbd 100644
--- a/third_party/WebKit/Source/web/tests/WebViewTest.cpp
+++ b/third_party/WebKit/Source/web/tests/WebViewTest.cpp
@@ -4110,6 +4110,29 @@ TEST_P(WebViewTest, NestedPageSuspensions) {
   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()),