[cast_channel] Implement CastSocketService::OpenSocket()

components/cast_channel/cast_test_util.cc

Index: components/cast_channel/cast_test_util.cc
diff --git a/components/cast_channel/cast_test_util.cc b/components/cast_channel/cast_test_util.cc
index 6ae2d0375f8b0968d731e1384bb957ed78e8a353..3f86d1fa724e01128186993ad78ecf7488f81dd6 100644
--- a/components/cast_channel/cast_test_util.cc
+++ b/components/cast_channel/cast_test_util.cc
@@ -26,7 +26,13 @@ void MockCastTransport::SetReadDelegate(
 MockCastTransportDelegate::MockCastTransportDelegate() {}
 MockCastTransportDelegate::~MockCastTransportDelegate() {}
 
-MockCastSocket::MockCastSocket() : mock_transport_(new MockCastTransport()) {}
+MockCastSocket::MockCastSocket()
+    : channel_id_(0),
+      channel_auth_(ChannelAuthType::NONE),
+      error_state_(ChannelError::NONE),
+      keep_alive_(false),
+      audio_only_(false),
+      mock_transport_(new MockCastTransport()) {}
 MockCastSocket::~MockCastSocket() {}
 
 net::IPEndPoint CreateIPEndPointForTest() {