mash: Change CastConfigDelegate to a mojoified CastConfigClient.

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 51 matching lines @@
   };
 
   UpdateInfo();
   ~UpdateInfo();
 
   UpdateSeverity severity;
   bool update_required;
   bool factory_reset_required;
 };
 
-class CastConfigDelegate;
 class NetworkingConfigDelegate;
 
 // SystemTrayDelegate is intended for delegating tasks in the System Tray to the
 // application (e.g. Chrome). These tasks should be limited to application
 // (browser) specific tasks. For non application specific tasks, where possible,
 // components/, chromeos/, device/, etc., code should be used directly. If more
 // than one related method is being added, consider adding an additional
 // specific delegate (e.g. CastConfigDelegate).
 //
 // These methods should all have trivial default implementations for platforms
@@ skipping 94 matching lines @@
 
   // 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.
   virtual bool GetBluetoothDiscovering();
 
-  // Returns CastConfigDelegate. May return nullptr.
-  virtual CastConfigDelegate* GetCastConfigDelegate();
-
   // Returns NetworkingConfigDelegate. May return nullptr.
   virtual NetworkingConfigDelegate* GetNetworkingConfigDelegate() const;
 
   // Retrieves the session start time. Returns |false| if the time is not set.
   virtual bool GetSessionStartTime(base::TimeTicks* session_start_time);
 
   // Retrieves the session length limit. Returns |false| if no limit is set.
   virtual bool GetSessionLengthLimit(base::TimeDelta* session_length_limit);
 
   // Get the system tray menu size in pixels (dependent on the language).
@@ skipping 19 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_