Don't use browser windows for platform app shell windows

chrome/browser/ui/extensions/shell_window.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/extensions/shell_window.h"
+
+#include "chrome/browser/extensions/extension_process_manager.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "content/public/browser/notification_details.h"
+#include "content/public/browser/notification_source.h"
+
+ShellWindow::ShellWindow(ExtensionHost* host)
+    : host_(host) {
+  // Close the window in response to window.close() and the like.
+  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_HOST_VIEW_SHOULD_CLOSE,
+                 content::Source<Profile>(host->profile()));
+}
+
+ShellWindow::~ShellWindow() {
+}
+
+ShellWindow* ShellWindow::Create(Profile* profile,
+                                 const Extension* extension,
+                                 const GURL& url) {
+  ExtensionProcessManager* manager = profile->GetExtensionProcessManager();
+  DCHECK(manager);
+  if (!manager)
+    return NULL;
+
+  ExtensionHost* host = manager->CreateShellHost(extension, url);
+  // CHECK host so that non-GTK platform compilers don't complain about unused
+  // variables.
+  // TODO(mihaip): remove when ShellWindow has been implemented everywhere.
+  CHECK(host);
+
+#if defined(TOOLKIT_GTK)
+  // This object will delete itself when the window is closed.
+  // TODO(mihaip): remove the #if block when ShellWindow has been implemented
+  // everywhere.
+  return ShellWindow::CreateShellWindow(host);
+#endif
+
+  return NULL;
+}
+
+void ShellWindow::Observe(int type,
+                          const content::NotificationSource& source,
+                          const content::NotificationDetails& details) {
+  switch (type) {
+    case chrome::NOTIFICATION_EXTENSION_HOST_VIEW_SHOULD_CLOSE:
+      if (content::Details<ExtensionHost>(host_.get()) == details)
+        Close();
+      break;
+    default:
+      NOTREACHED() << "Received unexpected notification";
+  }
+}