cros: Remove system-level policy for audio capture allowed

chromeos/audio/audio_devices_pref_handler_impl.h

 // Copyright (c) 2013 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_AUDIO_AUDIO_DEVICES_PREF_HANDLER_IMPL_H_
 #define CHROMEOS_AUDIO_AUDIO_DEVICES_PREF_HANDLER_IMPL_H_
 
 #include <string>
 
 #include "base/observer_list.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "base/values.h"
 #include "chromeos/audio/audio_devices_pref_handler.h"
 #include "chromeos/chromeos_export.h"
 
 class PrefRegistrySimple;
 class PrefService;
 
 namespace chromeos {
 
 // Class which implements AudioDevicesPrefHandler interface and register audio
 // preferences as well.
 class CHROMEOS_EXPORT AudioDevicesPrefHandlerImpl
     : public AudioDevicesPrefHandler {
  public:
-  AudioDevicesPrefHandlerImpl(PrefService* local_state,
-                              const std::string& audio_capture_allowed_pref);
+  // |local_state| is the device-wide preference service.
+  explicit AudioDevicesPrefHandlerImpl(PrefService* local_state);
 
   // Overridden from AudioDevicesPrefHandler.
   virtual double GetOutputVolumeValue(const AudioDevice* device) override;
   virtual double GetInputGainValue(const AudioDevice* device) override;
   virtual void SetVolumeGainValue(const AudioDevice& device,
                                   double value) override;
 
   virtual bool GetMuteValue(const AudioDevice& device) override;
   virtual void SetMuteValue(const AudioDevice& device, bool mute_on) override;
 
-  virtual bool GetAudioCaptureAllowedValue() override;
   virtual bool GetAudioOutputAllowedValue() override;
 
   virtual void AddAudioPrefObserver(AudioPrefObserver* observer) override;
   virtual void RemoveAudioPrefObserver(AudioPrefObserver* observer) override;
 
   // Registers volume and mute preferences.
-  static void RegisterPrefs(PrefRegistrySimple* registry,
-                            const std::string& audio_capture_allowed_pref);
+  static void RegisterPrefs(PrefRegistrySimple* registry);
 
  protected:
   virtual ~AudioDevicesPrefHandlerImpl();
 
  private:
   // Initializes the observers for the policy prefs.
   void InitializePrefObservers();
 
   // Update and save methods for the mute preferences for all devices.
   void UpdateDevicesMutePref();
@@ skipping 14 matching lines @@
   void MigrateDeviceVolumeSettings(std::string active_device);
 
   // Notifies the AudioPrefObserver for audio policy pref changes.
   void NotifyAudioPolicyChange();
 
   scoped_ptr<base::DictionaryValue> device_mute_settings_;
   scoped_ptr<base::DictionaryValue> device_volume_settings_;
 
   PrefService* local_state_;  // not owned
 
-  // The name of the preferences to check if audio capture is allowed or the
-  // empty string if audio capture is always allowed.
-  const std::string audio_capture_allowed_pref_;
-
   PrefChangeRegistrar pref_change_registrar_;
   ObserverList<AudioPrefObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioDevicesPrefHandlerImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_AUDIO_AUDIO_DEVICES_PREF_HANDLER_IMPL_H_