Add chrome.system.network interface to chrome-app

Original code by @MohamedAbdalkader

chrome/chrome-app-tests.ts

@@ -316,3 +316,12 @@ function testSocketsTcpServerTypes(): void {
     socketInfo.localAddress = "192.168.0.2";
     socketInfo.localPort = 8000;
 }
+
+function testSystemNetwork() {
+    chrome.system.network.getNetworkInterfaces((networkInterfaces) => {
+        var iface: chrome.system.network.NetworkInterface;
+        for (var i in networkInterfaces) {
+            iface = networkInterfaces[i];
+        }
+    });
+}

chrome/chrome-app.d.ts

@@ -378,3 +378,16 @@ declare module chrome.sockets.tcpServer {
     var onAccept: Event<AcceptEventArgs>;
     var onAcceptError: Event<AcceptErrorEventArgs>;
 }
+
+////////////////////
+// System - Network
+////////////////////
+declare module chrome.system.network {
+    interface NetworkInterface {
+        name: string;
+        address: string;
+        prefixLength: number;
+    }
+
+    export function getNetworkInterfaces(callback: (networkInterfaces: NetworkInterface[]) => void): void;
+}