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

chrome/browser/ui/views/extensions/extension_install_dialog_view.cc

 // Copyright (c) 2012 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/ui/views/extensions/extension_install_dialog_view.h"
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/i18n/rtl.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/experience_sampling_private/experience_sampling.h"
 #include "chrome/browser/extensions/bundle_installer.h"
 #include "chrome/browser/extensions/extension_install_prompt_experiment.h"
+#include "chrome/browser/extensions/extension_install_prompt_show_params.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "chrome/installer/util/browser_distribution.h"
 #include "components/constrained_window/constrained_window_views.h"
 #include "content/public/browser/page_navigator.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 131 matching lines @@
   checkbox->set_listener(listener);
   // Alignment needs to be explicitly set again here, otherwise the views are
   // not vertically centered.
   layout->AddView(checkbox, 1, 1,
                   views::GridLayout::LEADING, views::GridLayout::CENTER);
   layout->AddView(view, 1, 1,
                   views::GridLayout::LEADING, views::GridLayout::CENTER);
 }
 
 void ShowExtensionInstallDialogImpl(
-    const ExtensionInstallPrompt::ShowParams& show_params,
+    ExtensionInstallPromptShowParams* show_params,
     ExtensionInstallPrompt::Delegate* delegate,
     scoped_refptr<ExtensionInstallPrompt::Prompt> prompt) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   ExtensionInstallDialogView* dialog =
-      new ExtensionInstallDialogView(show_params.profile,
-                                     show_params.parent_web_contents,
+      new ExtensionInstallDialogView(show_params->profile(),
+                                     show_params->GetParentWebContents(),
                                      delegate,
                                      prompt);
-  CreateBrowserModalDialogViews(dialog, show_params.parent_window)->Show();
+  CreateBrowserModalDialogViews(dialog, show_params->GetParentWindow())->Show();
 }
 
 CustomScrollableView::CustomScrollableView() {}
 CustomScrollableView::~CustomScrollableView() {}
 
 void CustomScrollableView::Layout() {
   SetBounds(x(), y(), width(), GetHeightForWidth(width()));
   views::View::Layout();
 }
 
@@ skipping 977 matching lines @@
 void ExpandableContainerView::ExpandWithoutAnimation() {
   expanded_ = true;
   details_view_->AnimateToState(1.0);
 }
 
 // static
 ExtensionInstallPrompt::ShowDialogCallback
 ExtensionInstallPrompt::GetDefaultShowDialogCallback() {
   return base::Bind(&ShowExtensionInstallDialogImpl);
 }