Fix DCHECK crash failed: object->isLayoutNGBlockFlow() in Inline Builder

third_party/WebKit/Source/core/layout/ng/ng_line_builder.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_line_builder.h"
 
 #include "core/layout/BidiRun.h"
 #include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/line/LineInfo.h"
 #include "core/layout/line/RootInlineBox.h"
@@ skipping 291 matching lines @@
     unsigned logical_index = indices_in_visual_order[visual_index];
     line_item_chunks_in_visual_order[visual_index] =
         (*line_item_chunks)[logical_index];
   }
   line_item_chunks->swap(line_item_chunks_in_visual_order);
 }
 
 // TODO(glebl): Add the support of clearance for inline floats.
 void NGLineBuilder::LayoutAndPositionFloat(LayoutUnit end_position,
                                            LayoutObject* layout_object) {
-  LayoutNGBlockFlow* block_flow = toLayoutNGBlockFlow(layout_object);
-  NGBlockNode* node = new NGBlockNode(block_flow);
-
+  NGBlockNode* node = new NGBlockNode(layout_object);
   RefPtr<NGConstraintSpace> float_space = CreateConstraintSpaceForFloat(
       node->Style(), ConstraintSpace(), &space_builder_);
+
   // TODO(glebl): add the fragmentation support:
   // same writing mode - get the inline size ComputeInlineSizeForFragment to
   // determine if it fits on this line, then perform layout with the correct
   // fragmentation line.
   // diff writing mode - get the inline size from performing layout.
   RefPtr<NGLayoutResult> layout_result = node->Layout(float_space.get());
 
   NGBoxFragment float_fragment(
       float_space->WritingMode(),
       toNGPhysicalBoxFragment(layout_result->PhysicalFragment().get()));
@@ skipping 269 matching lines @@
     root_line_box->setLineTopBottomPositions(
         baseline - LayoutUnit(metrics.ascent),
         baseline + LayoutUnit(metrics.descent), line_top_with_leading,
         baseline + LayoutUnit(metrics.descent_and_leading));
 
     bidi_runs.deleteRuns();
     fragments_for_bidi_runs.clear();
   }
 }
 }  // namespace blink