[DevTools] Fix compile errors before closure compiler roll

third_party/WebKit/Source/devtools/front_end/devices/DevicesView.js

 // Copyright 2015 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.
 
 /**
  * @constructor
  * @extends {WebInspector.VBox}
  */
 WebInspector.DevicesView = function()
 {
@@ skipping 432 matching lines @@
      */
     update: function(device)
     {
         if (!this._device || this._device.adbModel !== device.adbModel)
             this._deviceTitle.textContent = device.adbModel;
 
         if (!this._device || this._device.adbSerial !== device.adbSerial)
             this._deviceSerial.textContent = "#" + device.adbSerial;
 
         this._deviceOffline.classList.toggle("hidden", device.adbConnected);
-        this._noBrowsers.classList.toggle("hidden", !device.adbConnected || device.browsers.length);
+        this._noBrowsers.classList.toggle("hidden", !device.adbConnected || !!device.browsers.length);
         this._browsers.classList.toggle("hidden", !device.adbConnected || !device.browsers.length);
 
         var browserIds = new Set();
         for (var browser of device.browsers)
             browserIds.add(browser.id);
 
         for (var browserId of this._browserById.keys()) {
             if (!browserIds.has(browserId)) {
                 this._browserById.get(browserId).element.remove();
                 this._browserById.remove(browserId);
@@ skipping 223 matching lines @@
         if (transient.length)
             title.push(WebInspector.UIString("Transient: %s", transient.join(", ")));
         if (error.length)
             title.push(WebInspector.UIString("Error: %s", error.join(", ")));
         this._portStatus.title = title.join("; ");
         this._portStatus.classList.toggle("hidden", empty);
     },
 
     __proto__: WebInspector.VBox.prototype
 }