M57: Properly clean up in PrintViewManager::RenderFrameCreated().

chrome/browser/printing/print_view_manager_unittest.cc

+// Copyright 2017 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 "chrome/browser/printing/print_view_manager.h"
+#include "chrome/browser/printing/print_preview_test.h"
+#include "chrome/browser/ui/browser_commands.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "content/public/test/test_renderer_host.h"
+
+namespace printing {
+
+using PrintViewManagerTest = PrintPreviewTest;
+
+TEST_F(PrintViewManagerTest, PrintSubFrameAndDestroy) {
+  chrome::NewTab(browser());
+  content::WebContents* web_contents =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  ASSERT_TRUE(web_contents);
+
+  content::RenderFrameHost* sub_frame =
+      content::RenderFrameHostTester::For(web_contents->GetMainFrame())
+          ->AppendChild("child");
+
+  PrintViewManager* print_view_manager =
+      PrintViewManager::FromWebContents(web_contents);
+  ASSERT_TRUE(print_view_manager);
+  EXPECT_FALSE(print_view_manager->print_preview_rfh());
+
+  print_view_manager->PrintPreviewNow(sub_frame, false);
+  EXPECT_TRUE(print_view_manager->print_preview_rfh());
+
+  content::RenderFrameHostTester::For(sub_frame)->Detach();
+  EXPECT_FALSE(print_view_manager->print_preview_rfh());
+}
+
+}  // namespace printing