[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_coding/codecs/mock/mock_audio_encoder.h

Index: webrtc/modules/audio_coding/codecs/mock/mock_audio_encoder.h
diff --git a/webrtc/modules/audio_coding/codecs/mock/mock_audio_encoder.h b/webrtc/modules/audio_coding/codecs/mock/mock_audio_encoder.h
index 545fc1941a0a27ff6a6822bea6934763f4fb9ece..3bfbd73fe6b87b4a6577df3a19e154a5ed82bc48 100644
--- a/webrtc/modules/audio_coding/codecs/mock/mock_audio_encoder.h
+++ b/webrtc/modules/audio_coding/codecs/mock/mock_audio_encoder.h
@@ -22,7 +22,7 @@ class MockAudioEncoder : public AudioEncoder {
   virtual ~MockAudioEncoder() { Die(); }
   MOCK_METHOD0(Die, void());
   MOCK_CONST_METHOD0(SampleRateHz, int());
-  MOCK_CONST_METHOD0(NumChannels, int());
+  MOCK_CONST_METHOD0(NumChannels, size_t());
   MOCK_CONST_METHOD0(MaxEncodedBytes, size_t());
   MOCK_CONST_METHOD0(Num10MsFramesInNextPacket, size_t());
   MOCK_CONST_METHOD0(Max10MsFramesInAPacket, size_t());
@@ -40,7 +40,7 @@ class MockAudioEncoder : public AudioEncoder {
 class MockAudioEncoderMutable : public AudioEncoderMutable {
  public:
   MOCK_CONST_METHOD0(SampleRateHz, int());
-  MOCK_CONST_METHOD0(NumChannels, int());
+  MOCK_CONST_METHOD0(NumChannels, size_t());
   MOCK_CONST_METHOD0(MaxEncodedBytes, size_t());
   MOCK_CONST_METHOD0(Num10MsFramesInNextPacket, size_t());
   MOCK_CONST_METHOD0(Max10MsFramesInAPacket, size_t());