[LayoutNG] Fix ShapingLineBreaker when the end of range is needed

third_party/WebKit/Source/platform/fonts/shaping/ShapingLineBreaker.h

 // 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.
 
 #ifndef ShapingLineBreaker_h
 #define ShapingLineBreaker_h
 
 #include "platform/LayoutUnit.h"
 #include "platform/PlatformExport.h"
 #include "platform/wtf/text/AtomicString.h"
@@ skipping 27 matching lines @@
   ~ShapingLineBreaker() {}
 
   // Shapes a line of text by finding a valid and appropriate break opportunity
   // based on the shaping results for the entire paragraph.
   // The output parameter breakOffset indicates the resulting break offset.
   PassRefPtr<ShapeResult> ShapeLine(unsigned start_offset,
                                     LayoutUnit available_space,
                                     unsigned* break_offset);
 
  private:
+  PassRefPtr<ShapeResult> ShapeToEnd(unsigned start,
+                                     LayoutUnit start_position,
+                                     unsigned range_end);
 
   const HarfBuzzShaper* shaper_;
   const Font* font_;
   const ShapeResult* result_;
   const LazyLineBreakIterator* break_iterator_;
   String text_;
 };
 
 }  // namespace blink
 
 #endif  // ShapingLineBreaker_h