On Linux, automatically create app shortcuts on install or update.

chrome/browser/web_applications/web_app_linux.cc

Index: chrome/browser/web_applications/web_app_linux.cc
diff --git a/chrome/browser/web_applications/web_app_linux.cc b/chrome/browser/web_applications/web_app_linux.cc
index 0378b2acfb480b363b32f19409064ce482960023..7685c386336038c671d6097f2766ace002b67d10 100644
--- a/chrome/browser/web_applications/web_app_linux.cc
+++ b/chrome/browser/web_applications/web_app_linux.cc
@@ -40,7 +40,20 @@ void DeletePlatformShortcuts(
 void UpdatePlatformShortcuts(
     const base::FilePath& web_app_path,
     const ShellIntegration::ShortcutInfo& shortcut_info) {
-  // TODO(benwells): Implement this.
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
+
+  scoped_ptr<base::Environment> env(base::Environment::Create());
+
+  // Find out whether shortcuts are already installed.
+  ShellIntegration::ShortcutLocations creation_locations =
+      ShellIntegrationLinux::GetExistingShortcutLocations(
+          env.get(), shortcut_info.profile_path, shortcut_info.extension_id);
+  // Always create a hidden shortcut in applications if a visible one is not
+  // being created. This allows the operating system to identify the app, but
+  // not show it in the menu.
+  creation_locations.hidden = true;
+
+  CreatePlatformShortcuts(web_app_path, shortcut_info, creation_locations);
 }
 
 }  // namespace internals