Constrain width/height to minmax values

third_party/WebKit/Source/core/layout/ng/ng_length_utils.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/ng/ng_length_utils.h"
 
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_constraint_space_builder.h"
 #include "core/layout/ng/ng_fragment.h"
 #include "core/style/ComputedStyle.h"
@@ skipping 390 matching lines @@
   if (style.marginStart().isAuto() && style.marginEnd().isAuto()) {
     margins->inline_start = available_space / 2;
     margins->inline_end = available_space - margins->inline_start;
   } else if (style.marginStart().isAuto()) {
     margins->inline_start = available_space;
   } else if (style.marginEnd().isAuto()) {
     margins->inline_end = available_space;
   }
 }
 
+LayoutUnit ConstrainByMinMax(LayoutUnit length,
+                             Optional<LayoutUnit> min,
+                             Optional<LayoutUnit> max) {
+  if (max && length > max.value())
+    length = max.value();
+  if (min && length < min.value())
+    length = min.value();
+  return length;
+}
+
 }  // namespace blink