Refactor HarfBuzzShaper to not retain font data

third_party/WebKit/Source/platform/fonts/shaping/CachingWordShapeIterator.cpp

 // 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 "platform/fonts/shaping/CachingWordShapeIterator.h"
 
 #include "platform/fonts/shaping/HarfBuzzShaper.h"
 
 namespace blink {
 
 PassRefPtr<const ShapeResult> CachingWordShapeIterator::shapeWordWithoutSpacing(
     const TextRun& wordRun,
     const Font* font) {
   ShapeCacheEntry* cacheEntry = m_shapeCache->add(wordRun, ShapeCacheEntry());
   if (cacheEntry && cacheEntry->m_shapeResult)
     return cacheEntry->m_shapeResult;
 
-  HarfBuzzShaper shaper(font, wordRun);
-  RefPtr<const ShapeResult> shapeResult = shaper.shapeResult();
+  HarfBuzzShaper shaper(wordRun);
+  RefPtr<const ShapeResult> shapeResult = shaper.shapeResult(font);
   if (!shapeResult)
     return nullptr;
 
   if (cacheEntry)
     cacheEntry->m_shapeResult = shapeResult;
 
   return shapeResult.release();
 }
 
 }  // namespace blink