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

chrome/common/extensions/api/app_window.idl

 // 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.
 
 namespace app.window {
   dictionary CreateWindowOptions {
     // Id to identify the window. This will be used to remember the size
     // and position of the window and restore that geometry when a window
     // with the same id (and no explicit size or position) is later opened.
     DOMString? id;
@@ skipping 32 matching lines @@
     long? maxWidth;
 
     // Maximum height of the window.
     long? maxHeight;
 
     // Window type: 'shell' (the default) is the only currently supported value.
     DOMString? type;
 
     // Frame type: 'none' or 'chrome' (defaults to 'chrome').
     DOMString? frame;
+
+    // If true, the window will be created in a hidden state. Call show() on
+    // the window to show it once it has been created. Defaults to false.
+    boolean? hidden;

[benwells, 2012/10/16 05:54:55]

Hidden windows will keep their browser keep alive, preventing the process from
being destroyed. Is there any indication to the user that there is a window?
We've been aiming for no indication of app indication -> no browser keep alive,
this change may break that.

[jeremya, 2012/10/16 06:31:32]

That's true. Perhaps the keepalive should check visibility of windows?

   };
 
   callback CreateWindowCallback =
       void ([instanceOf=AppWindow] object created_window);
 
   dictionary AppWindow {
     // Focus the window.
     static void focus();
 
     // Minimize the window.
     static void minimize();
 
     // Maximize the window.
     static void maximize();
 
     // Restore the window.
     static void restore();
 
     // Move the window to the position (|x|, |y|).
     static void moveTo(long x, long y);
 
     // Resize the window to |width|x|height| pixels in size.
     static void resizeTo(long width, long height);
 
+    // Show the window. Does nothing if the window is already visible.
+    static void show();
+
+    // Hide the window. Does nothing if the window is already hidden.
+    static void hide();
+
     // The JavaScript 'window' object for the created child.
     [instanceOf=global] object contentWindow;
   };
 
   interface Functions {
     // The size and position of a window can be specified in a number of
     // different ways. The most simple option is not specifying anything at
     // all, in which case a default size and platform dependent position will
     // be used.
     //
@@ skipping 18 matching lines @@
     // If you specify both a regular and a default value for the same option
     // the regular value is the only one that takes effect.
     static void create(DOMString url,
                        optional CreateWindowOptions options,
                        optional CreateWindowCallback callback);
 
     [nocompile] static AppWindow current();
     [nocompile, nodoc] static void initializeAppWindow(object state);
   };
 };