Add UMA logging for target audio bitrate

webrtc/modules/audio_coding/main/acm2/audio_coding_module_unittest_oldapi.cc

 /*
  *  Copyright (c) 2014 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 1546 matching lines @@
   EXPECT_CALL(mock_encoder, SampleRateHz())
       .Times(AtLeast(1))
       .WillRepeatedly(Invoke(&encoder, &AudioEncoderMutablePcmU::SampleRateHz));
   EXPECT_CALL(mock_encoder, NumChannels())
       .Times(AtLeast(1))
       .WillRepeatedly(Invoke(&encoder, &AudioEncoderMutablePcmU::NumChannels));
   EXPECT_CALL(mock_encoder, EncodeInternal(_, _, _, _))
       .Times(AtLeast(1))
       .WillRepeatedly(
           Invoke(&encoder, &AudioEncoderMutablePcmU::EncodeInternal));
+  EXPECT_CALL(mock_encoder, GetTargetBitrate())
+      .Times(AtLeast(1))
+      .WillRepeatedly(Invoke(
+          &encoder, &AudioEncoderMutablePcmU::GetTargetBitrate));
   ASSERT_NO_FATAL_FAILURE(
       SetUpTestExternalEncoder(&mock_encoder, codec_inst.pltype));
   Run("81a9d4c0bb72e9becc43aef124c981e9", "8f9b8750bd80fe26b6cbf6659b89f0f9",
       50, test::AcmReceiveTestOldApi::kMonoOutput);
 }
 
 // This test fixture is implemented to run ACM and change the desired output
 // frequency during the call. The input packets are simply PCM16b-wb encoded
 // payloads with a constant value of |kSampleValue|. The test fixture itself
 // acts as PacketSource in between the receive test class and the constant-
@@ skipping 103 matching lines @@
   Run(16000, 8000, 1000);
 }
 
 TEST_F(AcmSwitchingOutputFrequencyOldApi, Toggle8KhzTo16Khz) {
   Run(8000, 16000, 1000);
 }
 
 #endif
 
 }  // namespace webrtc