Replace size_t with int in a few media classes.

webkit/media/buffered_data_source.h

Index: webkit/media/buffered_data_source.h
diff --git a/webkit/media/buffered_data_source.h b/webkit/media/buffered_data_source.h
index e9d979ef4f82dabd75182d67766fc93578636167..9935c515dd2e67ab9aeb9ea851ed288d15fae153 100644
--- a/webkit/media/buffered_data_source.h
+++ b/webkit/media/buffered_data_source.h
@@ -36,11 +36,8 @@ class BufferedDataSource : public WebDataSource {
   virtual void Stop(const base::Closure& closure) OVERRIDE;
   virtual void SetPlaybackRate(float playback_rate) OVERRIDE;
 
-  virtual void Read(
-      int64 position,
-      size_t size,
-      uint8* data,
-      const media::DataSource::ReadCB& read_cb) OVERRIDE;
+  virtual void Read(int64 position, int size, uint8* data,
+                    const media::DataSource::ReadCB& read_cb) OVERRIDE;
   virtual bool GetSize(int64* size_out) OVERRIDE;
   virtual bool IsStreaming() OVERRIDE;
   virtual void SetPreload(media::Preload preload) OVERRIDE;