[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_processing/include/mock_audio_processing.h

Index: webrtc/modules/audio_processing/include/mock_audio_processing.h
diff --git a/webrtc/modules/audio_processing/include/mock_audio_processing.h b/webrtc/modules/audio_processing/include/mock_audio_processing.h
index 7018c538a97d75e45a6bd6caa27376c770e0ff8d..bc4d5d1968f13dc3c921b9bcb64e3edb83367b28 100644
--- a/webrtc/modules/audio_processing/include/mock_audio_processing.h
+++ b/webrtc/modules/audio_processing/include/mock_audio_processing.h
@@ -201,11 +201,11 @@ class MockAudioProcessing : public AudioProcessing {
   MOCK_CONST_METHOD0(proc_split_sample_rate_hz,
       int());
   MOCK_CONST_METHOD0(num_input_channels,
-      int());
+      size_t());
   MOCK_CONST_METHOD0(num_output_channels,
-      int());
+      size_t());
   MOCK_CONST_METHOD0(num_reverse_channels,
-      int());
+      size_t());
   MOCK_METHOD1(set_output_will_be_muted,
       void(bool muted));
   MOCK_CONST_METHOD0(output_will_be_muted,