Add a 'hidden' option to chrome.app.window.create()

chrome/common/extensions/api/app_current_window_internal.idl

Index: chrome/common/extensions/api/app_current_window_internal.idl
diff --git a/chrome/common/extensions/api/app_current_window_internal.idl b/chrome/common/extensions/api/app_current_window_internal.idl
index 7cc6f9574c69b4321ec6c181e124c61707dd4ea8..2bf231b456156cb4abe00a4d560c2c467b878ceb 100644
--- a/chrome/common/extensions/api/app_current_window_internal.idl
+++ b/chrome/common/extensions/api/app_current_window_internal.idl
@@ -2,24 +2,17 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This is used by the app window API internally to pass through messages to
+// the shell window.
 [internal, nodoc] namespace app.currentWindowInternal {
   interface Functions {
-    // Focus the window.
     static void focus();
-
-    // Minimize the window.
     static void minimize();
-
-    // Maximize the window.
     static void maximize();
-
-    // Restore the window.
     static void restore();
-
-    // Draw attention to the window.
     static void drawAttention();
-
-    // Clear attention to the window.
     static void clearAttention();
+    static void show();
+    static void hide();
   };
 };