Add YUV_420_BIPLANAR to gfx::BufferFormat.

gpu/command_buffer/tests/gl_manager.cc

Index: gpu/command_buffer/tests/gl_manager.cc
diff --git a/gpu/command_buffer/tests/gl_manager.cc b/gpu/command_buffer/tests/gl_manager.cc
index 548935823c0f599ccfde32d4a7b70f664be8ba3a..7897d1635cd0c3b9e48ad539bd524088d46d20c6 100644
--- a/gpu/command_buffer/tests/gl_manager.cc
+++ b/gpu/command_buffer/tests/gl_manager.cc
@@ -58,6 +58,11 @@ size_t SubsamplingFactor(gfx::BufferFormat format, int plane) {
       DCHECK_LT(static_cast<size_t>(plane), arraysize(factor));
       return factor[plane];
     }
+    case gfx::BufferFormat::YUV_420_BIPLANAR: {
+      static size_t factor[] = {1, 2};
+      DCHECK_LT(static_cast<size_t>(plane), arraysize(factor));
+      return factor[plane];
+    }
   }
   NOTREACHED();
   return 0;
@@ -89,6 +94,8 @@ size_t StrideInBytes(size_t width, gfx::BufferFormat format, int plane) {
       return 0;
     case gfx::BufferFormat::YUV_420:
       return width / SubsamplingFactor(format, plane);
+    case gfx::BufferFormat::YUV_420_BIPLANAR:
+      return width;
   }
 
   NOTREACHED();