Remove unused ConvertNV21ToYUV function.

media/base/yuv_convert.cc

Index: media/base/yuv_convert.cc
diff --git a/media/base/yuv_convert.cc b/media/base/yuv_convert.cc
index 9bc9a93197c042112c587ced34806a9601346647..fd428730f6a2c25756bf6c17e52d11274a59826f 100644
--- a/media/base/yuv_convert.cc
+++ b/media/base/yuv_convert.cc
@@ -719,23 +719,6 @@ void ConvertYUY2ToYUV(const uint8* src,
   }
 }
 
-void ConvertNV21ToYUV(const uint8* src,
-                      uint8* yplane,
-                      uint8* uplane,
-                      uint8* vplane,
-                      int width,
-                      int height) {
-  int y_plane_size = width * height;
-  memcpy(yplane, src, y_plane_size);
-
-  src += y_plane_size;
-  int u_plane_size = y_plane_size >> 2;
-  for (int i = 0; i < u_plane_size; ++i) {
-    *vplane++ = *src++;
-    *uplane++ = *src++;
-  }
-}
-
 void ConvertYUVToRGB32(const uint8* yplane,
                        const uint8* uplane,
                        const uint8* vplane,