[LayoutNG] Make NG algorithms non-oilpan.

third_party/WebKit/Source/core/layout/ng/ng_inline_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_inline_node.h"
 
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_constraint_space_builder.h"
 #include "core/layout/ng/ng_fragment_builder.h"
 #include "core/layout/ng/ng_line_builder.h"
@@ skipping 51 matching lines @@
     style_ = ComputedStyle::create();
     style_->font().update(nullptr);
   }
 
   void CreateLine(
       NGInlineNode* node,
       HeapVector<Member<const NGPhysicalTextFragment>>* fragments_out) {
     NGConstraintSpace* constraint_space =
         NGConstraintSpaceBuilder(kHorizontalTopBottom).ToConstraintSpace();
     NGLineBuilder line_builder(node, constraint_space);
-    NGTextLayoutAlgorithm* algorithm =
-        new NGTextLayoutAlgorithm(node, constraint_space);
-    algorithm->LayoutInline(&line_builder);
+
+    NGTextLayoutAlgorithm algorithm(node, constraint_space);
+    algorithm.LayoutInline(&line_builder);
 
     NGFragmentBuilder fragment_builder(NGPhysicalFragment::kFragmentBox,
                                        /* layout_object */ nullptr);
     line_builder.CreateFragments(&fragment_builder);
     NGPhysicalBoxFragment* fragment = fragment_builder.ToBoxFragment();
     for (const NGPhysicalFragment* child : fragment->Children()) {
       fragments_out->push_back(toNGPhysicalTextFragment(child));
     }
   }
 
@@ skipping 106 matching lines @@
   CreateLine(node, &fragments);
   ASSERT_EQ(5u, fragments.size());
   TEST_TEXT_FRAGMENT(fragments[0], node, 0u, 1u, TextDirection::kLtr);
   TEST_TEXT_FRAGMENT(fragments[1], node, 6u, 7u, TextDirection::kRtl);
   TEST_TEXT_FRAGMENT(fragments[2], node, 4u, 5u, TextDirection::kLtr);
   TEST_TEXT_FRAGMENT(fragments[3], node, 2u, 3u, TextDirection::kRtl);
   TEST_TEXT_FRAGMENT(fragments[4], node, 8u, 9u, TextDirection::kLtr);
 }
 
 }  // namespace blink