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

chrome/common/extensions/api/app_window.idl

Index: chrome/common/extensions/api/app_window.idl
diff --git a/chrome/common/extensions/api/app_window.idl b/chrome/common/extensions/api/app_window.idl
index 7eed76f60d2e5a365569ad789723f5c20d5dff8b..55cfafcaa841d2367c0c06790948a55f65c1d4b0 100644
--- a/chrome/common/extensions/api/app_window.idl
+++ b/chrome/common/extensions/api/app_window.idl
@@ -50,6 +50,10 @@ namespace app.window {
 
     // 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 =
@@ -74,6 +78,12 @@ namespace app.window {
     // 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;
   };