Add EncodedImageCallback::OnEncodedImage().

webrtc/modules/rtp_rtcp/source/nack_rtx_unittest.cc

Index: webrtc/modules/rtp_rtcp/source/nack_rtx_unittest.cc
diff --git a/webrtc/modules/rtp_rtcp/source/nack_rtx_unittest.cc b/webrtc/modules/rtp_rtcp/source/nack_rtx_unittest.cc
index a0e0cecff68e7922bcbafdbf83c8d18647e06f8b..052060cc2479b9ac15af97d4ebbdc86768e99af9 100644
--- a/webrtc/modules/rtp_rtcp/source/nack_rtx_unittest.cc
+++ b/webrtc/modules/rtp_rtcp/source/nack_rtx_unittest.cc
@@ -264,9 +264,9 @@ class RtpRtcpRtxNackTest : public ::testing::Test {
     uint32_t timestamp = 3000;
     uint16_t nack_list[kVideoNackListSize];
     for (int frame = 0; frame < kNumFrames; ++frame) {
-      EXPECT_EQ(0, rtp_rtcp_module_->SendOutgoingData(
-                       webrtc::kVideoFrameDelta, kPayloadType, timestamp,
-                       timestamp / 90, payload_data, payload_data_length));
+      EXPECT_TRUE(rtp_rtcp_module_->SendOutgoingData(
+          webrtc::kVideoFrameDelta, kPayloadType, timestamp, timestamp / 90,
+          payload_data, payload_data_length, nullptr, nullptr, nullptr));
       // Min required delay until retransmit = 5 + RTT ms (RTT = 0).
       fake_clock.AdvanceTimeMilliseconds(5);
       int length = BuildNackList(nack_list);
@@ -310,9 +310,9 @@ TEST_F(RtpRtcpRtxNackTest, LongNackList) {
   // Send 30 frames which at the default size is roughly what we need to get
   // enough packets.
   for (int frame = 0; frame < kNumFrames; ++frame) {
-    EXPECT_EQ(0, rtp_rtcp_module_->SendOutgoingData(
-                     webrtc::kVideoFrameDelta, kPayloadType, timestamp,
-                     timestamp / 90, payload_data, payload_data_length));
+    EXPECT_TRUE(rtp_rtcp_module_->SendOutgoingData(
+        webrtc::kVideoFrameDelta, kPayloadType, timestamp, timestamp / 90,
+        payload_data, payload_data_length, nullptr, nullptr, nullptr));
     // Prepare next frame.
     timestamp += 3000;
     fake_clock.AdvanceTimeMilliseconds(33);