Enable visibleOnAllWorkspaces on stable.

extensions/common/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.
 
 // Use the <code>chrome.app.window</code> API to create windows. Windows
 // have an optional frame with title bar and size controls. They are not
 // associated with any Chrome browser windows. See the <a
 // href="https://github.com/GoogleChrome/chrome-app-samples/tree/master/samples/window-state">
 // Window State Sample</a> for a demonstration of these options.
 namespace app.window {
@@ skipping 254 matching lines @@
     // permission. Defaults to false.
     //
     // Call <code>setAlwaysOnTop()</code> on the window to change this property
     // after creation.
     boolean? alwaysOnTop;
 
     // 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
   // the created window (child). The parent can set fields or functions on the
   // child usable from onload. E.g. background.js:
   //
   // <code>function(createdWindow) { createdWindow.contentWindow.foo =
   // function () { }; };</code>
   //
@@ skipping 98 matching lines @@
     // Set whether the window should stay above most other windows. Requires the
     // <code>alwaysOnTopWindows</code> permission.
     static void setAlwaysOnTop(boolean alwaysOnTop);
 
     // Can the window use alpha transparency?
     // 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);
 
     // Set whether the window should get all keyboard events including system
     // keys that are usually not sent. This is best-effort subject to platform
     // specific constraints. Requires the <code>"app.window.allKeys"</code>
     // permission. This is currently available only in dev channel on Windows.
     static void setInterceptAllKeys(boolean wantAllKeys);
 
     // The JavaScript 'window' object for the created child.
     [instanceOf=Window] object contentWindow;
@@ skipping 82 matching lines @@
     // Fired when the window is restored from being minimized or maximized.
     [nocompile] static void onRestored();
 
     // Fired when the window's ability to use alpha transparency changes.
     [nocompile, nodoc] static void onAlphaEnabledChanged();
 
     // Event for testing. Lets tests wait until a window has been shown.
     [nocompile, nodoc] static void onWindowFirstShown();
   };
 };