Revert of Remove the deprecated EncodeInternal interface from AudioEncoder

webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng_unittest.cc

Index: webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng_unittest.cc
diff --git a/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng_unittest.cc b/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng_unittest.cc
index 8b80d2181da26208473e6a240537ff12aa7ff5bf..8f30d783ae4c8fa24170f6074163cae365343390 100644
--- a/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng_unittest.cc
+++ b/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng_unittest.cc
@@ -25,6 +25,7 @@
 namespace webrtc {
 
 namespace {
+static const size_t kMockMaxEncodedBytes = 1000;
 static const size_t kMaxNumSamples = 48 * 10 * 2;  // 10 ms @ 48 kHz stereo.
 static const size_t kMockReturnEncodedBytes = 17;
 static const int kCngPayloadType = 18;
@@ -73,6 +74,8 @@
       // as long as it is smaller than 10.
       EXPECT_CALL(*mock_encoder_, Max10MsFramesInAPacket())
           .WillOnce(Return(1u));
+      EXPECT_CALL(*mock_encoder_, MaxEncodedBytes())
+          .WillRepeatedly(Return(kMockMaxEncodedBytes));
     }
     cng_.reset(new AudioEncoderCng(std::move(config)));
   }
@@ -87,8 +90,8 @@
   }
 
   // Expect |num_calls| calls to the encoder, all successful. The last call
-  // claims to have encoded |kMockReturnEncodedBytes| bytes, and all the
-  // preceding ones 0 bytes.
+  // claims to have encoded |kMockMaxEncodedBytes| bytes, and all the preceding
+  // ones 0 bytes.
   void ExpectEncodeCalls(size_t num_calls) {
     InSequence s;
     AudioEncoder::EncodedInfo info;