Add YUV_420_BIPLANAR to gfx::BufferFormat.

ui/gl/gl_image_memory.cc

Index: ui/gl/gl_image_memory.cc
diff --git a/ui/gl/gl_image_memory.cc b/ui/gl/gl_image_memory.cc
index f34611851c042ab8a3fdb92ae4df2ce69c882744..0409d6dd704538273b20edc77a12558791f30014 100644
--- a/ui/gl/gl_image_memory.cc
+++ b/ui/gl/gl_image_memory.cc
@@ -47,6 +47,7 @@ bool ValidFormat(BufferFormat format) {
       return true;
     case BufferFormat::RGBX_8888:
     case BufferFormat::YUV_420:
+    case BufferFormat::YUV_420_BIPLANAR:
       return false;
   }
 
@@ -62,6 +63,7 @@ bool IsCompressedFormat(BufferFormat format) {
     case BufferFormat::DXT5:
     case BufferFormat::ETC1:
     case BufferFormat::YUV_420:
+    case BufferFormat::YUV_420_BIPLANAR:
       return true;
     case BufferFormat::R_8:
     case BufferFormat::RGBA_4444:
@@ -96,6 +98,7 @@ GLenum TextureFormat(BufferFormat format) {
       return GL_BGRA_EXT;
     case BufferFormat::RGBX_8888:
     case BufferFormat::YUV_420:
+    case BufferFormat::YUV_420_BIPLANAR:
       NOTREACHED();
       return 0;
   }
@@ -123,6 +126,7 @@ GLenum DataType(BufferFormat format) {
     case BufferFormat::ETC1:
     case BufferFormat::RGBX_8888:
     case BufferFormat::YUV_420:
+    case BufferFormat::YUV_420_BIPLANAR:
       NOTREACHED();
       return 0;
   }
@@ -203,6 +207,7 @@ bool GLImageMemory::StrideInBytes(size_t width,
       return true;
     case BufferFormat::RGBX_8888:
     case BufferFormat::YUV_420:
+    case BufferFormat::YUV_420_BIPLANAR:
       NOTREACHED();
       return false;
   }