[LayoutNG] Return MinAndMaxContentSizes by value, step 1

third_party/WebKit/Source/core/layout/ng/ng_block_node_test.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_block_node.h"
 
 #include "core/layout/ng/ng_box_fragment.h"
 #include "core/style/ComputedStyle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 namespace {
 class NGBlockNodeForTest : public ::testing::Test {
  protected:
   void SetUp() override { style_ = ComputedStyle::create(); }
 
   RefPtr<ComputedStyle> style_;
 };
 
 TEST_F(NGBlockNodeForTest, MinAndMaxContent) {
   const int kWidth = 30;
 
   RefPtr<ComputedStyle> first_style = ComputedStyle::create();
   first_style->setWidth(Length(kWidth, Fixed));
   NGBlockNode* first_child = new NGBlockNode(first_style.get());
 
   NGBlockNode* box = new NGBlockNode(style_.get());
   box->SetFirstChild(first_child);
 
-  MinAndMaxContentSizes sizes;
-  while (!box->ComputeMinAndMaxContentSizes(&sizes))
-    continue;
+  MinAndMaxContentSizes sizes = box->ComputeMinAndMaxContentSizes();
   EXPECT_EQ(LayoutUnit(kWidth), sizes.min_content);
   EXPECT_EQ(LayoutUnit(kWidth), sizes.max_content);
 }
 }  // namespace
 }  // namespace blink