message: Slightly increase the size of values that can be inlined inside of a variant.
  With the prior cleanup, variant::InlineValue::has_value was removed freeing up
  the space that variable was using for additional inline space.
diff: @@ -365,7 +365,7 @@ class Variant {
  struct InlineValue {
  // We try to size InlineValue so that sizeof(Variant) <= 64 and it can fit
  // into the aligned space of a TensorBuffer.
  - static constexpr int kMaxValueSize = (64 - /*some extra padding=*/16);
  + static constexpr int kMaxValueSize = (64 - /*some extra padding=*/8);
  typedef char ValueDataArray[kMaxValueSize];
  alignas(kMaxInlineValueAlignSize) ValueDataArray value_data;
  