Add missing functions for chrome windows api

chrome/chrome-app-tests.ts

@@ -23,8 +23,13 @@ chrome.app.runtime.onLaunched.addListener(function (launchData: runtime.LaunchDa
 
 chrome.app.runtime.onRestarted.addListener(function () { return; });
 
-// Get Current Window
+// retrieving windows
 var currentWindow: cwindow.AppWindow = chrome.app.window.current();
+var otherWindow: cwindow.AppWindow = chrome.app.window.get('some-string');
+var allWindows: cwindow.AppWindow[] = chrome.app.window.getAll();
+
+// check platform capabilities
+var visibleEverywhere: boolean = chrome.app.window.canSetVisibleOnAllWorkspaces();
 
 // FileSystem
 // https://developer.chrome.com/apps/fileSystem

chrome/chrome-app.d.ts

@@ -126,6 +126,9 @@ declare module chrome.app.window {
 
     export function create(url: string, options?: CreateWindowOptions, callback?: (created_window: AppWindow) => void): void;
     export function current(): AppWindow;
+    export function get(id: string): AppWindow;
+    export function getAll(): AppWindow[];
+    export function canSetVisibleOnAllWorkspaces(): boolean;
 
     interface WindowEvent {
         addListener(callback: () => void): void;