Initial CL for Data Saver (Flywheel) prompt when cellular network detected

chromeos/network/network_state_handler_observer.h

 // 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.
 
 #ifndef CHROMEOS_NETWORK_NETWORK_STATE_HANDLER_OBSERVER_H_
 #define CHROMEOS_NETWORK_NETWORK_STATE_HANDLER_OBSERVER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "chromeos/chromeos_export.h"
 
 namespace chromeos {
 
 class DeviceState;
 class NetworkState;
 
+const char kHotkeyDebugDataSaver[] = "hotkey-debug-datasaver";

[Daniel Erat, 2015/03/23 03:49:21]

please don't put constants in the toplevel chromeos namespace unless they need
to be there. this would be better as a public static member of whichever class
it's most closely related to.

[Greg Levin, 2015/03/24 20:35:32]

Done.

+
 // Observer class for all network state changes, including changes to
 // active (connecting or connected) services.
 class CHROMEOS_EXPORT NetworkStateHandlerObserver {
  public:
   NetworkStateHandlerObserver();
   virtual ~NetworkStateHandlerObserver();
 
   // The list of networks changed.
   virtual void NetworkListChanged();
 
@@ skipping 26 matching lines @@
   // can safely stop observing.
   virtual void IsShuttingDown();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NetworkStateHandlerObserver);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_NETWORK_NETWORK_STATE_HANDLER_OBSERVER_H_