Remove available_size DCHECK in absolute_utils

Remove a DCHECK in ng_absolute_utils liable to trigger incorrectly when
any combination of the component values are near the saturation limits.

Bug: 1002317
Change-Id: I1bc22823dd72a23c162eecb2f3c676e059617817
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1804937
Commit-Queue: Emil A Eklund <eae@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#696704}

third_party/blink/renderer/core/layout/ng/ng_absolute_utils.cc

@@ -234,18 +234,6 @@ void ComputeAbsoluteSize(const LayoutUnit border_padding_size,
            *margin_end;
   }
 
-#if DCHECK_IS_ON()
-  values_might_be_saturated |=
-      inset_start->MightBeSaturated() || inset_end->MightBeSaturated() ||
-      size->MightBeSaturated() || margin_start->MightBeSaturated() ||
-      margin_end->MightBeSaturated() || available_size.MightBeSaturated();
-  // The DCHECK is useful, but only holds true if the values aren't saturated.
-  if (!values_might_be_saturated) {
-    DCHECK_EQ(available_size,
-              *inset_start + *inset_end + *margin_start + *margin_end + *size);
-  }
-#endif  // #if DCHECK_IS_ON()
-
   // If calculated |size| is outside of min/max constraints, rerun the
   // algorithm with the constrained |size|.
   LayoutUnit constrained_size = ConstrainByMinMax(*size, min_size, max_size);