Add AppWindow.setVisibleOnAllWorkspaces.

extensions/common/api/app_window.idl

Index: extensions/common/api/app_window.idl
diff --git a/extensions/common/api/app_window.idl b/extensions/common/api/app_window.idl
index caff663e29def5edda094f0f520ba3571bbe3072..3a6e9dc5ea39ea798a66f6b987090b8da11d0eb2 100644
--- a/extensions/common/api/app_window.idl
+++ b/extensions/common/api/app_window.idl
@@ -263,6 +263,10 @@ namespace app.window {
 
     // If true, the window will be focused when created. Defaults to true.
     boolean? focused;
+
+    // If true, the window will be visible on all workspaces.
+    // This is only available on dev channel.
+    boolean? visibleOnAllWorkspaces;
   };
 
   // Called in the creating window (parent) before the load event is called in
@@ -369,6 +373,11 @@ namespace app.window {
     // TODO(jackhou): Document this properly before going to stable.
     [nodoc] static boolean alphaEnabled();
 
+    // For platforms that support multiple workspaces, is this window visible on
+    // all of them?
+    // This is only available on dev channel.
+    static void setVisibleOnAllWorkspaces(boolean alwaysVisible);
+
     // The JavaScript 'window' object for the created child.
     [instanceOf=Window] object contentWindow;
 
@@ -426,6 +435,10 @@ namespace app.window {
     // Gets an $(ref:AppWindow) with the given id. If no window with the given id
     // exists null is returned. This method is new in Chrome 33.
     [nocompile] static AppWindow get(DOMString id);
+
+    // Does the current platform support windows being visible on all
+    // workspaces?
+    [nocompile] static boolean canSetVisibleOnAllWorkspaces();
   };
 
   interface Events {