Add support for converting I420 software frames into NV12 hardware frames

ui/gl/gl_image_io_surface.mm

Index: ui/gl/gl_image_io_surface.mm
diff --git a/ui/gl/gl_image_io_surface.mm b/ui/gl/gl_image_io_surface.mm
index fa4395c4194765c5ab7e8daf171b58b5acad2d03..a5ff01f7d1fd0e5a68c9e33e1b8b1d88289c8567 100644
--- a/ui/gl/gl_image_io_surface.mm
+++ b/ui/gl/gl_image_io_surface.mm
@@ -37,6 +37,7 @@ bool ValidFormat(BufferFormat format) {
     case BufferFormat::R_8:
     case BufferFormat::BGRA_8888:
     case BufferFormat::UYVY_422:
+    case BufferFormat::YUV_420_BIPLANAR:
       return true;
     case BufferFormat::ATC:
     case BufferFormat::ATCIA:
@@ -57,6 +58,7 @@ bool ValidFormat(BufferFormat format) {
 GLenum TextureFormat(BufferFormat format) {
   switch (format) {
     case BufferFormat::R_8:
+    case BufferFormat::YUV_420_BIPLANAR:
       return GL_RED;
     case BufferFormat::BGRA_8888:
       return GL_RGBA;
@@ -82,6 +84,7 @@ GLenum TextureFormat(BufferFormat format) {
 GLenum DataFormat(BufferFormat format) {
   switch (format) {
     case BufferFormat::R_8:
+    case BufferFormat::YUV_420_BIPLANAR:
       return GL_RED;
     case BufferFormat::BGRA_8888:
       return GL_BGRA;
@@ -108,6 +111,7 @@ GLenum DataFormat(BufferFormat format) {
 GLenum DataType(BufferFormat format) {
   switch (format) {
     case BufferFormat::R_8:
+    case BufferFormat::YUV_420_BIPLANAR:
       return GL_UNSIGNED_BYTE;
     case BufferFormat::BGRA_8888:
       return GL_UNSIGNED_INT_8_8_8_8_REV;