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

chrome/browser/extensions/extension_install_prompt_show_params.cc

-// 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_show_params.h"
-
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ui/native_window_tracker.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/browser/web_contents_observer.h"
-
-namespace {
-
-Profile* ProfileForWebContents(content::WebContents* web_contents) {
-  if (!web_contents)
-    return nullptr;
-  return Profile::FromBrowserContext(web_contents->GetBrowserContext());
-}
-
-gfx::NativeWindow NativeWindowForWebContents(content::WebContents* contents) {
-  if (!contents)
-    return nullptr;
-
-  return contents->GetTopLevelNativeWindow();
-}
-
-}  // namespace
-
-class ExtensionInstallPromptShowParams::WebContentsDestructionObserver
-    : public content::WebContentsObserver {
- public:
-  explicit WebContentsDestructionObserver(
-      ExtensionInstallPromptShowParams* params)
-      : content::WebContentsObserver(params->GetParentWebContents()),
-        params_(params) {
-  }
-
-  virtual ~WebContentsDestructionObserver() {
-  }
-
-  virtual void WebContentsDestroyed() override {
-    params_->WebContentsDestroyed();
-  }
-
- private:
-  // Not owned.
-  ExtensionInstallPromptShowParams* params_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebContentsDestructionObserver);
-};
-
-ExtensionInstallPromptShowParams::ExtensionInstallPromptShowParams(
-    content::WebContents* contents)
-    : profile_(ProfileForWebContents(contents)),
-      parent_web_contents_(contents),
-      parent_web_contents_destroyed_(false),
-      parent_window_(NativeWindowForWebContents(contents)) {
-  if (contents) {
-    web_contents_destruction_observer_.reset(
-        new WebContentsDestructionObserver(this));
-  }
-  if (parent_window_)
-    native_window_tracker_ = NativeWindowTracker::Create(parent_window_);
-}
-
-ExtensionInstallPromptShowParams::ExtensionInstallPromptShowParams(
-    Profile* profile,
-    gfx::NativeWindow parent_window)
-  : profile_(profile),
-    parent_web_contents_(nullptr),
-    parent_web_contents_destroyed_(false),
-    parent_window_(parent_window) {
-  if (parent_window_)
-    native_window_tracker_ = NativeWindowTracker::Create(parent_window_);
-}
-
-ExtensionInstallPromptShowParams::~ExtensionInstallPromptShowParams() {
-}
-
-content::WebContents* ExtensionInstallPromptShowParams::GetParentWebContents() {
-  return parent_web_contents_;
-}
-
-gfx::NativeWindow ExtensionInstallPromptShowParams::GetParentWindow() {
-  return (native_window_tracker_ &&
-          !native_window_tracker_->WasNativeWindowClosed())
-             ? parent_window_
-             : nullptr;
-}
-
-bool ExtensionInstallPromptShowParams::WasParentDestroyed() {
-  return parent_web_contents_destroyed_ ||
-         (native_window_tracker_ &&
-          native_window_tracker_->WasNativeWindowClosed());
-}
-
-void ExtensionInstallPromptShowParams::WebContentsDestroyed() {
-  parent_web_contents_ = nullptr;
-  parent_web_contents_destroyed_ = true;
-}