Update a ton of audio code to use size_t more correctly and in general reduce

webrtc/modules/audio_coding/neteq/mock/mock_dtmf_tone_generator.h

Index: webrtc/modules/audio_coding/neteq/mock/mock_dtmf_tone_generator.h
diff --git a/webrtc/modules/audio_coding/neteq/mock/mock_dtmf_tone_generator.h b/webrtc/modules/audio_coding/neteq/mock/mock_dtmf_tone_generator.h
index 881e9005bb9722f91c52b4c368895be60590d5da..a1c370e1807cf9d4904d9981cf5eb979ac29c876 100644
--- a/webrtc/modules/audio_coding/neteq/mock/mock_dtmf_tone_generator.h
+++ b/webrtc/modules/audio_coding/neteq/mock/mock_dtmf_tone_generator.h
@@ -26,7 +26,7 @@ class MockDtmfToneGenerator : public DtmfToneGenerator {
   MOCK_METHOD0(Reset,
       void());
   MOCK_METHOD2(Generate,
-      int(int num_samples, AudioMultiVector* output));
+      int(size_t num_samples, AudioMultiVector* output));
   MOCK_CONST_METHOD0(initialized,
       bool());
 };