[layoutng] Add a function to compute the min- and max-content contribution

third_party/WebKit/Source/core/layout/ng/ng_units.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_units.h"
 
 namespace blink {
 
 LayoutUnit MinAndMaxContentSizes::ShrinkToFit(LayoutUnit available_size) const {
   DCHECK_GE(max_content, min_content);
   return std::min(max_content, std::max(min_content, available_size));
 }
 
+bool MinAndMaxContentSizes::operator==(
+    const MinAndMaxContentSizes& other) const {
+  return min_content == other.min_content && max_content == other.max_content;
+}
+
 NGPhysicalSize NGLogicalSize::ConvertToPhysical(NGWritingMode mode) const {
   return mode == kHorizontalTopBottom ? NGPhysicalSize(inline_size, block_size)
                                       : NGPhysicalSize(block_size, inline_size);
 }
 
 bool NGLogicalSize::operator==(const NGLogicalSize& other) const {
   return std::tie(other.inline_size, other.block_size) ==
          std::tie(inline_size, block_size);
 }
 
@@ skipping 253 matching lines @@
       position.type = (direction == LTR) ? kTopLeft : kBottomLeft;
       break;
     case kSidewaysLeftRight:
       position.type = (direction == LTR) ? kBottomLeft : kTopLeft;
       break;
   }
   return position;
 }
 
 }  // namespace blink