Remove RegisterExternal{De,En}coder error codes.

webrtc/modules/video_coding/video_coding_robustness_unittest.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 26 matching lines @@
     ASSERT_TRUE(clock_.get() != NULL);
     vcm_ = VideoCodingModule::Create(clock_.get(), &event_factory_);
     ASSERT_TRUE(vcm_ != NULL);
     const size_t kMaxNackListSize = 250;
     const int kMaxPacketAgeToNack = 450;
     vcm_->SetNackSettings(kMaxNackListSize, kMaxPacketAgeToNack, 0);
     ASSERT_EQ(0, vcm_->RegisterFrameTypeCallback(&frame_type_callback_));
     ASSERT_EQ(0, vcm_->RegisterPacketRequestCallback(&request_callback_));
     ASSERT_EQ(VCM_OK, vcm_->Codec(kVideoCodecVP8, &video_codec_));
     ASSERT_EQ(VCM_OK, vcm_->RegisterReceiveCodec(&video_codec_, 1));
-    ASSERT_EQ(VCM_OK, vcm_->RegisterExternalDecoder(&decoder_,
-                                                    video_codec_.plType,
-                                                    true));
+    vcm_->RegisterExternalDecoder(&decoder_, video_codec_.plType, true);
   }
 
   virtual void TearDown() {
     VideoCodingModule::Destroy(vcm_);
   }
 
   void InsertPacket(uint32_t timestamp,
                     uint16_t seq_no,
                     bool first,
                     bool marker_bit,
@@ skipping 169 matching lines @@
 
   clock_->AdvanceTimeMilliseconds(23);
   InsertPacket(3000, 4, false, false, kVideoFrameDelta);
 
   InsertPacket(9000, 9, true, false, kVideoFrameDelta);
   InsertPacket(9000, 10, false, false, kVideoFrameDelta);
   InsertPacket(9000, 11, false, true, kVideoFrameDelta);
   EXPECT_EQ(VCM_OK, vcm_->Decode(0));  // Decode timestamp 9000 complete.
 }
 }  // namespace webrtc