Add support for converting I420 software frames into NV12 hardware frames

ui/gfx/buffer_format_util.cc

Index: ui/gfx/buffer_format_util.cc
diff --git a/ui/gfx/buffer_format_util.cc b/ui/gfx/buffer_format_util.cc
index e0abf167b01e61f86b59e42f7879e4947b577e5d..17dfe1500a591e333f6fe01a4bba40c3860e0423 100644
--- a/ui/gfx/buffer_format_util.cc
+++ b/ui/gfx/buffer_format_util.cc
@@ -22,6 +22,8 @@ size_t NumberOfPlanesForBufferFormat(BufferFormat format) {
     case BufferFormat::BGRA_8888:
     case BufferFormat::UYVY_422:
       return 1;
+    case BufferFormat::YUV_420_BIPLANAR:
+      return 2;
     case BufferFormat::YUV_420:
       return 3;
   }