Start app shim when app launched.

chrome/browser/web_applications/web_app.h

 // 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_WEB_APPLICATIONS_WEB_APP_H_
 #define CHROME_BROWSER_WEB_APPLICATIONS_WEB_APP_H_
 
 #include <string>
 #include <vector>
 
+#include "base/callback.h"
 #include "base/files/file_path.h"
 #include "build/build_config.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/common/web_application_info.h"
 
 namespace extensions {
 class Extension;
 }
 
 namespace gfx {
 class ImageFamily;
 }
 
+class Profile;
+
 namespace web_app {
 
 // Gets the user data directory for given web app. The path for the directory is
 // based on |extension_id|. If |extension_id| is empty then |url| is used
 // to construct a unique ID.
 base::FilePath GetWebAppDataDirectory(const base::FilePath& profile_path,
                                       const std::string& extension_id,
                                       const GURL& url);
 
 // Gets the user data directory to use for |extension| located inside
@@ skipping 54 matching lines @@
 #if defined(TOOLKIT_GTK)
 // GTK+ windows that correspond to web apps need to have a deterministic (and
 // different) WMClass than normal chrome windows so the window manager groups
 // them as a separate application.
 std::string GetWMClassFromAppName(std::string app_name);
 #endif
 
 // Gets the name of the Chrome Apps menu folder in which to place app shortcuts.
 string16 GetAppShortcutsSubdirName();
 
+#if defined(OS_MACOSX)
+void LaunchShim(Profile* profile,

[tapted, 2013/05/17 06:44:00]

This can probably go into web_app_mac.h. But you still need a non-#ifdefed-out
declaration in here otherwise platform_app_launcher.cc will only compile on Mac.

I think a wrapper is best, without the callback. Like:

MaybeLaunchShortcut(Profile*, const Extension*)

which is just a no-op on non-mac. 

[jackhou1, 2013/05/21 03:13:22]

I just if-defined this into a no-op for non-mac. If it's in web_app_mac.h, you
need to include that file to call it. Not sure of a way around that.

+                const extensions::Extension* extension,
+                base::Callback<void(bool)> completed);
+#endif
+
 namespace internals {
 
 #if defined(OS_WIN)
 bool CheckAndSaveIcon(const base::FilePath& icon_file,
                       const gfx::ImageFamily& image);
 
 std::vector<base::FilePath> GetShortcutPaths(
     const ShellIntegration::ShortcutLocations& creation_locations);
 #endif
 
@@ skipping 24 matching lines @@
 
 // Sanitizes |name| and returns a version of it that is safe to use as an
 // on-disk file name .
 base::FilePath GetSanitizedFileName(const string16& name);
 
 }  // namespace internals
 
 }  // namespace web_app
 
 #endif  // CHROME_BROWSER_WEB_APPLICATIONS_WEB_APP_H_