[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 99baf8fec1ae68362028c8b751d72faa996848cc..881d3fe1b78db26a8e3f71c41f545c8f85880666 100644
--- a/components/cast_channel/cast_socket_service.h
+++ b/components/cast_channel/cast_socket_service.h
@@ -60,7 +60,7 @@ class CastSocketService : public RefcountedKeyedService {
 
   // Returns the socket corresponding to |channel_id| if one exists, or nullptr
   // otherwise.
-  CastSocket* GetSocket(int channel_id) const;
+  virtual CastSocket* GetSocket(int channel_id) const;
 
   // Opens cast socket with |ip_endpoint| and invokes |open_cb| when opening
   // operation finishes. If cast socket with |ip_endpoint| already exists,
@@ -93,9 +93,9 @@ class CastSocketService : public RefcountedKeyedService {
   // |net_log|: Net log passed to cast socket.
   // |open_cb|: first parameter is channel id of newly created socket; second
   // parameter is channel error encountered during channel opening.
-  int OpenSocket(const net::IPEndPoint& ip_endpoint,
-                 net::NetLog* net_log,
-                 const OnOpenCallback& open_cb);
+  virtual int OpenSocket(const net::IPEndPoint& ip_endpoint,
+                         net::NetLog* net_log,
+                         const OnOpenCallback& open_cb);
 
   // Register read delegate to cast socket with |channel_id|. Returns false if
   // such socket does not exist.
@@ -109,6 +109,9 @@ class CastSocketService : public RefcountedKeyedService {
   // Sets injected ping timeout timer for testing.
   void SetPingTimeoutTimerForTest(std::unique_ptr<base::Timer> timer);
 
+ protected:
+  ~CastSocketService() override;
+
  private:
   FRIEND_TEST_ALL_PREFIXES(CastSocketServiceTest, TestOpenChannel);
   friend class CastSocketServiceTest;
@@ -133,8 +136,6 @@ class CastSocketService : public RefcountedKeyedService {
     PassThroughMessageHandler* pass_through_message_handler;
   };
 
-  ~CastSocketService() override;
-
   // RefcountedKeyedService implementation.
   void ShutdownOnUIThread() override;