Fix crash when user closes window prior to the "Confirm Install" prompt showing

chrome/browser/extensions/extension_install_prompt_browsertest.cc

Index: chrome/browser/extensions/extension_install_prompt_browsertest.cc
diff --git a/chrome/browser/extensions/extension_install_prompt_browsertest.cc b/chrome/browser/extensions/extension_install_prompt_browsertest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..066408866c367a6e6cc77f678de82aa9ca67b922
--- /dev/null
+++ b/chrome/browser/extensions/extension_install_prompt_browsertest.cc
@@ -0,0 +1,140 @@
+// Copyright 2014 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/extensions/extension_install_prompt.h"
+
+#include "base/run_loop.h"
+#include "chrome/browser/extensions/extension_install_prompt_show_params.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "content/public/test/test_utils.h"
+#include "extensions/common/extension.h"
+#include "extensions/common/extension_builder.h"
+#include "extensions/common/value_builder.h"
+
+namespace {
+
+scoped_refptr<extensions::Extension> BuildTestExtension() {
+  return extensions::ExtensionBuilder()
+      .SetManifest(extensions::DictionaryBuilder()
+                       .Set("name", "foo")
+                       .Set("version", "1.0"))
+      .Build();
+}
+
+// ExtensionInstallPrompt::ShowDialogCallback which proceeds without showing the
+// prompt.
+void TestShowDialogCallback(
+    ExtensionInstallPromptShowParams* params,
+    ExtensionInstallPrompt::Delegate* delegate,
+    scoped_refptr<ExtensionInstallPrompt::Prompt> prompt) {
+  delegate->InstallUIProceed();
+}
+
+class TestExtensionInstallPromptDelegate
+    : public ExtensionInstallPrompt::Delegate {
+ public:
+  explicit TestExtensionInstallPromptDelegate(const base::Closure& quit_closure)
+      : quit_closure_(quit_closure), proceeded_(false), aborted_(false) {}
+
+  ~TestExtensionInstallPromptDelegate() override {
+  }
+
+  bool DidProceed() {
+    return proceeded_;
+  }
+
+  bool DidAbort() {
+    return aborted_;
+  }
+
+ private:
+  void InstallUIProceed() override {
+    proceeded_ = true;
+    quit_closure_.Run();
+  }
+
+  void InstallUIAbort(bool user_initiated) override {
+    aborted_ = true;
+    quit_closure_.Run();
+  }
+
+  base::Closure quit_closure_;
+  bool proceeded_;
+  bool aborted_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestExtensionInstallPromptDelegate);
+};
+
+}  // namespace
+
+typedef InProcessBrowserTest ExtensionInstallPromptBrowserTest;
+
+// Test that ExtensionInstallPrompt aborts the install if the web contents which
+// were passed to the ExtensionInstallPrompt constructor get destroyed.
+// CrxInstaller takes in ExtensionInstallPrompt in the constructor and does a
+// bunch of asynchronous processing prior to confirming the install. A user may
+// close the current tab while this processing is taking place.
+IN_PROC_BROWSER_TEST_F(ExtensionInstallPromptBrowserTest,
+                       TrackParentWebContentsDestruction) {
+  AddBlankTabAndShow(browser());
+  TabStripModel* tab_strip_model = browser()->tab_strip_model();
+  content::WebContents* web_contents = tab_strip_model->GetActiveWebContents();
+  int web_contents_index = tab_strip_model->GetIndexOfWebContents(web_contents);
+  scoped_refptr<extensions::Extension> extension(BuildTestExtension());
+
+  ExtensionInstallPrompt prompt(web_contents);
+  tab_strip_model->CloseWebContentsAt(web_contents_index,
+                                      TabStripModel::CLOSE_NONE);
+  content::RunAllPendingInMessageLoop();
+
+  base::RunLoop run_loop;
+  TestExtensionInstallPromptDelegate delegate(run_loop.QuitClosure());
+  prompt.ConfirmInstall(&delegate, extension.get(),
+                        base::Bind(&TestShowDialogCallback));
+  run_loop.Run();
+  EXPECT_TRUE(delegate.DidAbort());
+}
+
+// Test that ExtensionInstallPrompt aborts the install if the gfx::NativeWindow
+// which is passed to the ExtensionInstallPrompt constructor is destroyed.
+IN_PROC_BROWSER_TEST_F(ExtensionInstallPromptBrowserTest,
+                       TrackParentWindowDestruction) {
+  // Create a second browser to prevent the app from exiting when the browser is
+  // closed.
+  CreateBrowser(browser()->profile());
+
+  scoped_refptr<extensions::Extension> extension(BuildTestExtension());
+
+  ExtensionInstallPrompt prompt(browser()->profile(),
+                                browser()->window()->GetNativeWindow());
+  browser()->window()->Close();
+  content::RunAllPendingInMessageLoop();
+
+  base::RunLoop run_loop;
+  TestExtensionInstallPromptDelegate delegate(run_loop.QuitClosure());
+  prompt.ConfirmInstall(&delegate, extension.get(),
+                        base::Bind(&TestShowDialogCallback));
+  run_loop.Run();
+  EXPECT_TRUE(delegate.DidAbort());
+}
+
+// Test that ExtensionInstallPrompt shows the dialog normally if no parent
+// web contents or parent gfx::NativeWindow is passed to the
+// ExtensionInstallPrompt constructor.
+IN_PROC_BROWSER_TEST_F(ExtensionInstallPromptBrowserTest, NoParent) {
+  scoped_refptr<extensions::Extension> extension(BuildTestExtension());
+
+  ExtensionInstallPrompt prompt(browser()->profile(), NULL);
+  base::RunLoop run_loop;
+  TestExtensionInstallPromptDelegate delegate(run_loop.QuitClosure());
+  prompt.ConfirmInstall(&delegate, extension.get(),
+                        base::Bind(&TestShowDialogCallback));
+  run_loop.Run();
+
+  // TestShowDialogCallback() should have signaled the install to proceed.
+  EXPECT_TRUE(delegate.DidProceed());
+}