Enable Device Discovery by default on Linux, ChromeOS and Windows.

chrome/browser/ui/webui/uber/uber_ui.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/webui/uber/uber_ui.h"
 
 #include "base/command_line.h"
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 115 matching lines @@
                              IDS_LOCAL_DISCOVERY_DEVICES_PAGE_TITLE);
   bool overridesHistory = HasExtensionType(profile,
       chrome::kChromeUIHistoryHost);
   source->AddString("overridesHistory",
                     ASCIIToUTF16(overridesHistory ? "yes" : "no"));
   source->DisableDenyXFrameOptions();
   source->OverrideContentSecurityPolicyFrameSrc("frame-src chrome:;");
 
   bool devicesHidden = true;
 #if defined(ENABLE_MDNS)
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableDeviceDiscovery)) {
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+           switches::kDisableDeviceDiscovery)) {
     devicesHidden = false;
   }
 #endif
   source->AddBoolean("devicesHidden", devicesHidden);
 
   return source;
 }
 
 }  // namespace
 
 UberUI::UberUI(content::WebUI* web_ui) : WebUIController(web_ui) {
   Profile* profile = Profile::FromWebUI(web_ui);
   content::WebUIDataSource::Add(profile, CreateUberHTMLSource());
 
   RegisterSubpage(chrome::kChromeUIExtensionsFrameURL);
   RegisterSubpage(chrome::kChromeUIHelpFrameURL);
   RegisterSubpage(chrome::kChromeUIHistoryFrameURL);
   RegisterSubpage(chrome::kChromeUISettingsFrameURL);
   RegisterSubpage(chrome::kChromeUIUberFrameURL);
 
 #if defined(ENABLE_MDNS)
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableDeviceDiscovery)) {
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+           switches::kDisableDeviceDiscovery)) {
     RegisterSubpage(chrome::kChromeUIDevicesFrameURL);
   }
 #endif
 }
 
 UberUI::~UberUI() {
   STLDeleteValues(&sub_uis_);
 }
 
 void UberUI::RegisterSubpage(const std::string& page_url) {
@@ skipping 70 matching lines @@
       web_ui()->CallJavascriptFunction(
           "uber_frame.setNavigationOverride",
           base::StringValue(chrome::kChromeUIHistoryHost),
           base::StringValue(overrides_history ? "yes" : "no"));
       break;
     }
     default:
       NOTREACHED();
   }
 }