Only one implementation of MockRtpPacketSink once

webrtc/call/rtx_receive_stream_unittest.cc

Index: webrtc/call/rtx_receive_stream_unittest.cc
diff --git a/webrtc/call/rtx_receive_stream_unittest.cc b/webrtc/call/rtx_receive_stream_unittest.cc
index 91ed2ca2c73fa2b954737696932a889dee7c7a72..e9c82105212adec197b49f6298c1e345b5df3be5 100644
--- a/webrtc/call/rtx_receive_stream_unittest.cc
+++ b/webrtc/call/rtx_receive_stream_unittest.cc
@@ -9,6 +9,7 @@
  */
 
 #include "webrtc/call/rtx_receive_stream.h"
+#include "webrtc/call/test/mock_rtp_packet_sink_interface.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_header_extension_map.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_header_extensions.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_packet_received.h"
@@ -22,11 +23,6 @@ namespace {
 using ::testing::_;
 using ::testing::StrictMock;
 
-class MockRtpPacketSink : public RtpPacketSinkInterface {
- public:
-  MOCK_METHOD1(OnRtpPacket, void(const RtpPacketReceived&));
-};
-
 constexpr int kMediaPayloadType = 100;
 constexpr int kRtxPayloadType = 98;
 constexpr uint32_t kMediaSSRC = 0x3333333;