Add option to install an ephemeral app to the Windows jump list

apps/shell_window.cc

Index: apps/shell_window.cc
diff --git a/apps/shell_window.cc b/apps/shell_window.cc
index 9c0247aef560ccf9a429c63df120539be4d452a9..7e0145d5ce3d9fe7d324d1533b0c9992bf4f37ba 100644
--- a/apps/shell_window.cc
+++ b/apps/shell_window.cc
@@ -212,6 +212,9 @@ void ShellWindow::Init(const GURL& url,
   // Close when the browser process is exiting.
   registrar_.Add(this, chrome::NOTIFICATION_APP_TERMINATING,
                  content::NotificationService::AllSources());
+  // Update the app menu if an ephemeral app becomes installed.
+  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_INSTALLED,
+                 content::Source<Profile>(profile_));
 
   shell_window_contents_->LoadContents(new_params.creator_process_id);
 
@@ -747,6 +750,15 @@ void ShellWindow::Observe(int type,
         native_app_window_->Close();
       break;
     }
+    case chrome::NOTIFICATION_EXTENSION_INSTALLED: {
+      const extensions::Extension* installed_extension =
+          content::Details<const extensions::InstalledExtensionInfo>(
+              details)->extension;
+      DCHECK(installed_extension);
+      if (installed_extension->id() == extension_->id())
+        native_app_window_->UpdateAppMenu();
+      break;
+    }
     case chrome::NOTIFICATION_APP_TERMINATING:
       native_app_window_->Close();
       break;