Fix installer download for apps v2.

remoting/webapp/host_install_dialog.js

 // Copyright 2014 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 strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /**
@@ skipping 65 matching lines @@
     remoting.setMode(remoting.AppMode.HOST_INSTALL_PROMPT);
 
     var hostPackageUrl =
         remoting.HostInstallDialog.hostDownloadUrls[navigator.platform];
     if (hostPackageUrl === undefined) {
       this.onErrorHandler_(remoting.Error.CANCELLED);
       return;
     }
 
     // Start downloading the package.
-    window.location = hostPackageUrl;
+    if (remoting.isAppsV2) {
+      // TODO(jamiewalch): Use chrome.downloads when it is available to
+      // apps v2 (http://crbug.com/174046)
+      window.open(hostPackageUrl);
+    } else {
+      window.location = hostPackageUrl;
+    }
 
     /** @type {function(remoting.HostController.AsyncResult):void} */
     this.onDoneHandler_ = onDone;
 
     /** @type {function(remoting.Error):void} */
     this.onErrorHandler_ = onError;
   }
 }
 
 /**
@@ skipping 30 matching lines @@
 
 remoting.HostInstallDialog.prototype.onRetryClicked_ = function() {
   this.retryInstallButton_.removeEventListener(
       'click', this.onRetryClickedHandler_.bind(this), false);
   this.continueInstallButton_.addEventListener(
       'click', this.onOkClickedHandler_, false);
   this.cancelInstallButton_.addEventListener(
       'click', this.onCancelClickedHandler_, false);
   remoting.setMode(remoting.AppMode.HOST_INSTALL_PROMPT);
 };
-