Use Opportunity Iterator to position text fragments in NGLineBuilder

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

Index: third_party/WebKit/Source/core/layout/ng/ng_base_layout_algorithm_test.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_base_layout_algorithm_test.h b/third_party/WebKit/Source/core/layout/ng/ng_base_layout_algorithm_test.h
new file mode 100644
index 0000000000000000000000000000000000000000..1e007240f8200a7b2b35b7d9d6d8813bdc8a46b8
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+++ b/third_party/WebKit/Source/core/layout/ng/ng_base_layout_algorithm_test.h
@@ -0,0 +1,30 @@
+// 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/LayoutTestHelper.h"
+
+#include "core/dom/Element.h"
+#include "core/layout/ng/ng_constraint_space.h"
+#include "core/layout/ng/ng_physical_box_fragment.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+// Base class for all LayoutNG Algorithms unit test classes.
+typedef bool TestParamLayoutNG;
+class NGBaseLayoutAlgorithmTest
+    : public ::testing::WithParamInterface<TestParamLayoutNG>,
+      public RenderingTest {
+ public:
+  NGBaseLayoutAlgorithmTest();
+  ~NGBaseLayoutAlgorithmTest();
+
+ protected:
+  void SetUp() override;
+
+  std::pair<RefPtr<NGPhysicalBoxFragment>, RefPtr<NGConstraintSpace>>
+  RunBlockLayoutAlgorithmForElement(Element* element);
+};
+
+}  // namespace blink