Change HarfBuzzShaper to use FloatBoxExtent for glyp bounds

Source/platform/fonts/harfbuzz/HarfBuzzShaper.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef HarfBuzzShaper_h
 #define HarfBuzzShaper_h
 
 #include "hb.h"
 #include "platform/fonts/GlyphBuffer.h"
+#include "platform/geometry/FloatBoxExtent.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/text/TextRun.h"
 #include "wtf/HashSet.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/unicode/CharacterNames.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class Font;
 class SimpleFontData;
 class HarfBuzzShaper FINAL {
 public:
     enum ForTextEmphasisOrNot {
         NotForTextEmphasis,
         ForTextEmphasis
     };
 
     HarfBuzzShaper(const Font*, const TextRun&, ForTextEmphasisOrNot = NotForTextEmphasis);
 
     void setDrawRange(int from, int to);
     bool shape(GlyphBuffer* = 0);
     FloatPoint adjustStartPoint(const FloatPoint&);
     float totalWidth() { return m_totalWidth; }
     int offsetForPosition(float targetX);
     FloatRect selectionRect(const FloatPoint&, int height, int from, int to);
-
-    float minGlyphBoundingBoxX() const { return m_minGlyphBoundingBoxX; }
-    float maxGlyphBoundingBoxX() const { return m_maxGlyphBoundingBoxX; }
-    float minGlyphBoundingBoxY() const { return m_minGlyphBoundingBoxY; }
-    float maxGlyphBoundingBoxY() const { return m_maxGlyphBoundingBoxY; }
+    FloatBoxExtent glyphBoundingBox() const { return m_glyphBoundingBox; }
 
 private:
     class HarfBuzzRun {
     public:
         HarfBuzzRun(const HarfBuzzRun&);
         ~HarfBuzzRun();
 
         static PassOwnPtr<HarfBuzzRun> create(const SimpleFontData* fontData, unsigned startIndex, unsigned numCharacters, TextDirection direction, hb_script_t script)
         {
             return adoptPtr(new HarfBuzzRun(fontData, startIndex, numCharacters, direction, script));
@@ skipping 78 matching lines @@
     Vector<OwnPtr<HarfBuzzRun>, 16> m_harfBuzzRuns;
 
     FloatPoint m_startOffset;
 
     int m_fromIndex;
     int m_toIndex;
 
     ForTextEmphasisOrNot m_forTextEmphasis;
 
     float m_totalWidth;
-    float m_minGlyphBoundingBoxX;
-    float m_maxGlyphBoundingBoxX;
-    float m_minGlyphBoundingBoxY;
-    float m_maxGlyphBoundingBoxY;
+    FloatBoxExtent m_glyphBoundingBox;
 
     friend struct CachedShapingResults;
 };
 
 } // namespace WebCore
 
 #endif // HarfBuzzShaper_h