Remove Chromecast extension support from cast system tray menu.

ash/common/cast_config_delegate.h

 // Copyright 2015 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_CAST_CONFIG_DELEGATE_H_
 #define ASH_COMMON_CAST_CONFIG_DELEGATE_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 67 matching lines @@
 
    protected:
     virtual ~Observer() {}
 
    private:
     DISALLOW_ASSIGN(Observer);
   };
 
   virtual ~CastConfigDelegate() {}
 
-  // Returns true if cast extension is installed.
-  // TODO(jdufault): Remove this function once the CastConfigDelegateChromeos is
-  // gone. See crbug.com/551132.
-  virtual bool HasCastExtension() const = 0;
-
   // Request fresh data from the backend. When the data is available, all
   // registered observers will get called.
   virtual void RequestDeviceRefresh() = 0;
 
   // Cast to a receiver specified by |receiver_id|.
   virtual void CastToReceiver(const std::string& receiver_id) = 0;
 
   // Stop an ongoing cast (this should be a user initiated stop). |activity_id|
   // is the identifier of the activity/route that should be stopped.
   virtual void StopCasting(const std::string& activity_id) = 0;
 
-  // Does the device have a settings page?
-  // TODO(jdufault): Remove this function once the CastConfigDelegateChromeos is
-  // gone. See crbug.com/551132.
-  virtual bool HasOptions() const = 0;
-
-  // Opens Options page for cast.
-  // TODO(jdufault): Remove this function once the CastConfigDelegateChromeos is
-  // gone. See crbug.com/551132.
-  virtual void LaunchCastOptions() = 0;
-
   // Add or remove an observer.
   virtual void AddObserver(Observer* observer) = 0;
   virtual void RemoveObserver(Observer* observer) = 0;
 
  private:
   DISALLOW_ASSIGN(CastConfigDelegate);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_CAST_CONFIG_DELEGATE_H_