Use Opportunity Iterator to position text fragments in NGLineBuilder

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

+// Copyright 2017 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_base_layout_algorithm_test.h"
+
+#include "core/layout/ng/layout_ng_block_flow.h"
+#include "core/layout/ng/ng_block_layout_algorithm.h"
+#include "core/layout/ng/ng_physical_fragment.h"
+namespace blink {
+
+NGBaseLayoutAlgorithmTest::NGBaseLayoutAlgorithmTest() {
+  RuntimeEnabledFeatures::setLayoutNGEnabled(true);
+  RuntimeEnabledFeatures::setLayoutNGInlineEnabled(true);
+}
+
+NGBaseLayoutAlgorithmTest::~NGBaseLayoutAlgorithmTest() {
+  RuntimeEnabledFeatures::setLayoutNGEnabled(false);
+  RuntimeEnabledFeatures::setLayoutNGInlineEnabled(false);
+}
+
+void NGBaseLayoutAlgorithmTest::SetUp() {
+  RenderingTest::SetUp();
+  enableCompositing();
+}
+
+std::pair<RefPtr<NGPhysicalBoxFragment>, RefPtr<NGConstraintSpace>>
+NGBaseLayoutAlgorithmTest::RunBlockLayoutAlgorithmForElement(Element* element) {
+  LayoutNGBlockFlow* block_flow = toLayoutNGBlockFlow(element->layoutObject());
+  NGBlockNode* node = new NGBlockNode(block_flow);
+  RefPtr<NGConstraintSpace> space =
+      NGConstraintSpace::CreateFromLayoutObject(*block_flow);
+
+  RefPtr<NGLayoutResult> result =
+      NGBlockLayoutAlgorithm(node, space.get()).Layout();
+  return std::make_pair(
+      toNGPhysicalBoxFragment(result->PhysicalFragment().get()), space);
+}
+
+}  // namespace blink