[LayoutNG] Switch NGConstraintSpace to being RefCounted.

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/LayoutTestHelper.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"
@@ skipping 60 matching lines @@
     // Get Ahem from document. Loading "Ahem.woff" using |createTestFont| fails
     // on linux_chromium_asan_rel_ng.
     loadAhem();
     setBodyInnerHTML("<div id=t style='font:10px Ahem'></div>");
     LayoutObject* layout_object = getLayoutObjectByElementId("t");
     style_->setFont(layout_object->style()->font());
   }
 
   void CreateLine(NGInlineNode* node,
                   Vector<RefPtr<const NGPhysicalTextFragment>>* fragments_out) {
-    NGConstraintSpace* constraint_space =
+    RefPtr<NGConstraintSpace> constraint_space =
         NGConstraintSpaceBuilder(kHorizontalTopBottom)
             .ToConstraintSpace(kHorizontalTopBottom);
-    NGLineBuilder line_builder(node, constraint_space);
+    NGLineBuilder line_builder(node, constraint_space.get());
 
-    NGTextLayoutAlgorithm algorithm(node, constraint_space);
+    NGTextLayoutAlgorithm algorithm(node, constraint_space.get());
     algorithm.LayoutInline(&line_builder);
 
     NGFragmentBuilder fragment_builder(NGPhysicalFragment::kFragmentBox, node);
     line_builder.CreateFragments(&fragment_builder);
     RefPtr<NGLayoutResult> result = fragment_builder.ToBoxFragment();
     for (const auto& child :
          toNGPhysicalBoxFragment(result->PhysicalFragment().get())
              ->Children()) {
       fragments_out->push_back(toNGPhysicalTextFragment(child.get()));
     }
@@ skipping 140 matching lines @@
   MinAndMaxContentSizes sizes = node->ComputeMinAndMaxContentSizes();
   // |min_content| should be the width of "BC" because there is an element
   // boundary between "B" and "C" but no break opportunities.
   // TODO(kojii): min_content should be 20, but is 30 until NGLineBuilder
   // implements trailing spaces correctly.
   EXPECT_EQ(30, sizes.min_content);
   EXPECT_EQ(60, sizes.max_content);
 }
 
 }  // namespace blink