Revert of [Media Router] Add CastMediaSinkService

components/cast_channel/cast_socket_service.h

Index: components/cast_channel/cast_socket_service.h
diff --git a/components/cast_channel/cast_socket_service.h b/components/cast_channel/cast_socket_service.h
index bb465e920dc1f654035c25d6705c8136ceb391f3..eea0aee1e190b259bbc1b84e06dfa8d8c9ffe439 100644
--- a/components/cast_channel/cast_socket_service.h
+++ b/components/cast_channel/cast_socket_service.h
@@ -37,7 +37,7 @@
 
   // Returns the socket corresponding to |channel_id| if one exists, or nullptr
   // otherwise.
-  virtual CastSocket* GetSocket(int channel_id) const;
+  CastSocket* GetSocket(int channel_id) const;
 
   CastSocket* GetSocket(const net::IPEndPoint& ip_endpoint) const;
 
@@ -72,10 +72,10 @@
   // |open_cb|: OnOpenCallback invoked when cast socket is opened.
   // |observer|: Observer handles messages and errors on newly opened socket.
   // Does not take ownership of |observer|.
-  virtual int OpenSocket(const net::IPEndPoint& ip_endpoint,
-                         net::NetLog* net_log,
-                         const CastSocket::OnOpenCallback& open_cb,
-                         CastSocket::Observer* observer);
+  int OpenSocket(const net::IPEndPoint& ip_endpoint,
+                 net::NetLog* net_log,
+                 const CastSocket::OnOpenCallback& open_cb,
+                 CastSocket::Observer* observer);
 
   // Returns an observer corresponding to |id|.
   CastSocket::Observer* GetObserver(const std::string& id);
@@ -89,10 +89,9 @@
   // Allow test to inject a mock cast socket.
   void SetSocketForTest(std::unique_ptr<CastSocket> socket_for_test);
 
- protected:
+ private:
   ~CastSocketService() override;
 
- private:
   // RefcountedKeyedService implementation.
   void ShutdownOnUIThread() override;