Add YUV_420_BIPLANAR to gfx::BufferFormat.

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 b488c533cc49c2a3295e48836499f125dc3d2830..3b8edcb13d79d7708bf1e4b5cbcbbbac53d617a7 100644
--- a/ui/gl/gl_image_io_surface.mm
+++ b/ui/gl/gl_image_io_surface.mm
@@ -45,6 +45,7 @@ bool ValidFormat(BufferFormat format) {
     case BufferFormat::RGBA_8888:
     case BufferFormat::RGBX_8888:
     case BufferFormat::YUV_420:
+    case BufferFormat::YUV_420_BIPLANAR:
       return false;
   }
 
@@ -67,6 +68,7 @@ GLenum TextureFormat(BufferFormat format) {
     case BufferFormat::RGBA_8888:
     case BufferFormat::RGBX_8888:
     case BufferFormat::YUV_420:
+    case BufferFormat::YUV_420_BIPLANAR:
       NOTREACHED();
       return 0;
   }
@@ -90,6 +92,7 @@ GLenum DataFormat(BufferFormat format) {
     case BufferFormat::RGBA_8888:
     case BufferFormat::RGBX_8888:
     case BufferFormat::YUV_420:
+    case BufferFormat::YUV_420_BIPLANAR:
       NOTREACHED();
       return 0;
   }
@@ -113,6 +116,7 @@ GLenum DataType(BufferFormat format) {
     case BufferFormat::RGBA_8888:
     case BufferFormat::RGBX_8888:
     case BufferFormat::YUV_420:
+    case BufferFormat::YUV_420_BIPLANAR:
       NOTREACHED();
       return 0;
   }