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

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 999b99990ac882fb04adbe70b37365314a1c761b..39fd79e41832f01f8172ca24dd81023cb5ad3617 100644
--- a/extensions/common/api/app_window.idl
+++ b/extensions/common/api/app_window.idl
@@ -288,6 +288,16 @@ namespace app.window {
     // 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