cros: Convert SystemTrayDelegate::ManageBluetoothDevices to mojo for mash

ash/common/system/tray/system_tray_delegate.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 ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_
 #define ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 134 matching lines @@
 
   // Returns a non-empty string if IMEs are managed by policy.
   virtual base::string16 GetIMEManagedMessage();
 
   // Switches to the selected input method.
   virtual void SwitchIME(const std::string& ime_id);
 
   // Activates an IME property.
   virtual void ActivateIMEProperty(const std::string& key);
 
-  // Shows UI to manage bluetooth devices.
-  virtual void ManageBluetoothDevices();
-
   // Toggles bluetooth.
   virtual void ToggleBluetooth();
 
   // Returns whether bluetooth capability is available.
   virtual bool GetBluetoothAvailable();
 
   // Returns whether bluetooth is enabled.
   virtual bool GetBluetoothEnabled();
 
   // Returns whether the delegate has initiated a bluetooth discovery session.
@@ skipping 31 matching lines @@
   // Creates a system tray item for display rotation lock.
   // TODO(jamescook): Remove this when mus has support for display management
   // and we have a DisplayManager equivalent. See http://crbug.com/548429
   virtual std::unique_ptr<SystemTrayItem> CreateRotationLockTrayItem(
       SystemTray* tray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_