Create a FakeTetherService, which stubs out TetherService for development.

chromeos/chromeos_switches.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 "chromeos/chromeos_switches.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/feature_list.h"
@@ skipping 260 matching lines @@
 // Enables action handler apps (e.g. creating new notes) on lock screen.
 const char kEnableLockScreenApps[] = "enable-lock-screen-apps";
 
 // Enables Kiosk mode for Chrome OS. Note this switch refers to retail mode
 // rather than the kiosk app mode.
 const char kEnableKioskMode[] = "enable-kiosk-mode";
 
 // Enables tethering to nearby LTE devices.
 const char kEnableTether[] = "enable-tether";
 
+// Overrides Tether with stub service. Provide integer arguments for the number
+// of fake networks desired, e.g. 'tether-stub=2'.
+const char kTetherStub[] = "tether-stub";
+
 // Disables material design OOBE UI.
 const char kDisableMdOobe[] = "disable-md-oobe";
 
 // Enables notifications about captive portals in session.
 const char kEnableNetworkPortalNotification[] =
     "enable-network-portal-notification";
 
 // Enables suggestions while typing on a physical keyboard.
 const char kEnablePhysicalKeyboardAutocorrect[] =
     "enable-physical-keyboard-autocorrect";
@@ skipping 252 matching lines @@
 }
 
 bool IsVoiceInteractionEnabled() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
              kEnableVoiceInteraction) ||
          base::FeatureList::IsEnabled(kVoiceInteractionFeature);
 }
 
 }  // namespace switches
 }  // namespace chromeos