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..a83c92d39b61d797e23abf3ef9d98f00fbdcd883 100644
--- a/webrtc/call/rtx_receive_stream_unittest.cc
+++ b/webrtc/call/rtx_receive_stream_unittest.cc
@@ -8,6 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include "webrtc/call/rtp_packet_sink_interface_mock.h"
 #include "webrtc/call/rtx_receive_stream.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_header_extension_map.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_header_extensions.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;