Make application shortcuts point to app_host.exe, install App Host during app installation.

chrome/browser/extensions/app_host_installer.h

Index: chrome/browser/extensions/app_host_installer.h
diff --git a/chrome/browser/extensions/app_host_installer.h b/chrome/browser/extensions/app_host_installer.h
new file mode 100644
index 0000000000000000000000000000000000000000..5aacdd47f6686a013ea920f4e5668526e6497a40
--- /dev/null
+++ b/chrome/browser/extensions/app_host_installer.h
@@ -0,0 +1,40 @@
+// 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_APP_HOST_INSTALLER_H_
+#define CHROME_BROWSER_EXTENSIONS_APP_HOST_INSTALLER_H_
+
+#include "base/bind.h"

[erikwright (departed), 2012/10/03 20:57:07]

include callback_fwd.h instead

[huangs, 2012/10/04 00:53:14]

Done.

+#include "base/win/object_watcher.h"
+#include "base/win/scoped_handle.h"
+
+namespace extensions {
+
+class Extension;
+
+class AppHostInstaller {
+ public:
+  AppHostInstaller();
+
+  // Returns true if App Host needs to be installed, for the given |extension|.
+  static bool IsAppHostInstallRequired(const Extension& extension);
+
+  // Installs App Host, then calls |callback| to proceed with installation.
+  // |callback| is a function that takes a bool parameter to indicate
+  // whether or not the App Host installation was successful.
+  void InstallAppHost(const base::Callback<void(bool)>& callback);
+
+ private:
+#if defined(OS_WIN)
+  base::win::ScopedHandle process_;
+  base::win::ObjectWatcher watcher_;
+  scoped_ptr<base::win::ObjectWatcher::Delegate> delegate_;

[erikwright (departed), 2012/10/03 20:57:07]

include scoped_ptr

[huangs, 2012/10/04 00:53:14]

Done.

+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(AppHostInstaller);

[erikwright (departed), 2012/10/03 20:57:07]

include basictypes.h

[huangs, 2012/10/04 00:53:14]

Done.

+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_APP_HOST_INSTALLER_H_