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

chrome/browser/extensions/app_shortcut_manager.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/extensions/app_shortcut_manager.h"
 
+#include "base/bind.h"
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
+#include "chrome/browser/extensions/app_host_installer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/web_applications/web_app.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension_resource.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 #include "grit/theme_resources.h"
 #include "skia/ext/image_operations.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 56 matching lines @@
 
 void AppShortcutManager::Observe(int type,
                                  const content::NotificationSource& source,
                                  const content::NotificationDetails& details) {
 #if !defined(OS_MACOSX)
   switch (type) {
     case chrome::NOTIFICATION_EXTENSION_INSTALLED: {
       const Extension* extension = content::Details<const Extension>(
           details).ptr();
       if (extension->is_platform_app())
         UpdateApplicationShortcuts(extension);

[erikwright (departed), 2012/11/02 01:07:26]

Perhaps we can just put, here:

#ifdef OS_WIN
  AppHostInstaller::EnsureAppHostInstalled(
      base::Bind(&AppShortcutManager::UpdateApplicationShortcuts,
                 base::Unretained(this), extension));
#else
  UpdateApplicationShortcuts(extension)
#endif

Then we can put an #ifdef'd include at the top of this file and rename
app_host_installer_impl_win.{cc,h} to app_host_installer_win.{cc,h}.

[huangs, 2012/11/02 18:39:01]

Done.

       break;
     }
     case chrome::NOTIFICATION_EXTENSION_UNINSTALLED: {
       const Extension* extension = content::Details<const Extension>(
           details).ptr();
       DeleteApplicationShortcuts(extension);
       break;
     }
     default:
       NOTREACHED();
   }
 #endif
 }
 
 void AppShortcutManager::UpdateApplicationShortcuts(
     const Extension* extension) {
+  app_host_installer::InstallAppHostIfNecessary(
+      *extension, base::Bind(&AppShortcutManager::OnAppHostInstallationComplete,
+                             base::Unretained(this), extension));
+}
+
+void AppShortcutManager::OnAppHostInstallationComplete(
+    const Extension* extension, bool app_host_install_success) {
+  if (!app_host_install_success) {
+    // Do not create shortcuts if App Host fails to install.
+    return;
+  }
+
   shortcut_info_ = ShortcutInfoForExtensionAndProfile(extension, profile_);
 
   std::vector<ImageLoadingTracker::ImageRepresentation> info_list;
   for (size_t i = 0; i < arraysize(kDesiredSizes); ++i) {
     int size = kDesiredSizes[i];
     ExtensionResource resource = extension->GetIconResource(
         size, ExtensionIconSet::MATCH_EXACTLY);
     if (!resource.empty()) {
       info_list.push_back(ImageLoadingTracker::ImageRepresentation(
           resource,
@@ skipping 30 matching lines @@
 }
 
 void AppShortcutManager::DeleteApplicationShortcuts(
     const Extension* extension) {
   ShellIntegration::ShortcutInfo delete_info =
       ShortcutInfoForExtensionAndProfile(extension, profile_);
   web_app::DeleteAllShortcuts(delete_info);
 }
 
 }  // namespace extensions