Update audio code to use size_t more correctly, talk/ portion.

talk/media/base/audiorenderer.h

Index: talk/media/base/audiorenderer.h
diff --git a/talk/media/base/audiorenderer.h b/talk/media/base/audiorenderer.h
index 155331820f4439ed13c29860e55ddcc620e4844c..5c03576fa79d2a593a2013b23035020fe4d1f852 100644
--- a/talk/media/base/audiorenderer.h
+++ b/talk/media/base/audiorenderer.h
@@ -28,6 +28,8 @@
 #ifndef TALK_MEDIA_BASE_AUDIORENDERER_H_
 #define TALK_MEDIA_BASE_AUDIORENDERER_H_
 
+#include <cstddef>
+
 namespace cricket {
 
 // Abstract interface for rendering the audio data.
@@ -40,7 +42,7 @@ class AudioRenderer {
                         int bits_per_sample,
                         int sample_rate,
                         int number_of_channels,
-                        int number_of_frames) = 0;
+                        size_t number_of_frames) = 0;
 
     // Called when the AudioRenderer is going away.
     virtual void OnClose() = 0;