Changes in app.window and app.runtime to support lock screen note taking

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 270 matching lines @@
     // 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, and supported by the platform, the window will be visible on all
     // workspaces.
     boolean? visibleOnAllWorkspaces;
+
+    // <p>If set, the action that is intended to be handled by the window on
+    //   lockscreen. This has to be set to create an app window visible on the
+    //   lock screen. The app window should be created only in response to an
+    //   app launch request for handling an action from the lock screen. App
+    //   window creation will fail if the app was not launched to handle the
+    //   action.
+    //   </p>
+    // <p>This is <b>Chrome OS only</b>.</p>
+    [nodoc] app.runtime.ActionType? lockScreenAction;
   };
 
   // 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>
   //
   // window.js:
@@ skipping 181 matching lines @@
     // Fired when the window is minimized.
     [nocompile] static void onMinimized();
 
     // 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();
   };
 };