Implement TrueType kerning support for HarfBuzz text path.

Source/core/platform/graphics/harfbuzz/HarfBuzzFaceCoreText.cpp

Index: Source/core/platform/graphics/harfbuzz/HarfBuzzFaceCoreText.cpp
diff --git a/Source/core/platform/graphics/harfbuzz/HarfBuzzFaceCoreText.cpp b/Source/core/platform/graphics/harfbuzz/HarfBuzzFaceCoreText.cpp
index e81ba594af5d892e0d5d91861c8970e6d3dd96c4..a8c120f2984cf0a36ec8d4105a6575d2ec9dcdf3 100644
--- a/Source/core/platform/graphics/harfbuzz/HarfBuzzFaceCoreText.cpp
+++ b/Source/core/platform/graphics/harfbuzz/HarfBuzzFaceCoreText.cpp
@@ -85,7 +85,7 @@ static hb_bool_t getGlyphExtents(hb_font_t* hbFont, void* fontData, hb_codepoint
     return true;
 }
 
-static hb_font_funcs_t* harfBuzzCoreTextGetFontFuncs()
+static hb_font_funcs_t* harfBuzzCoreTextGetFontFuncs(const TypesettingFeatures&)
 {
     static hb_font_funcs_t* harfBuzzCoreTextFontFuncs = 0;
 
@@ -129,10 +129,10 @@ hb_face_t* HarfBuzzFace::createFace()
     return face;
 }
 
-hb_font_t* HarfBuzzFace::createFont()
+hb_font_t* HarfBuzzFace::createFont(const TypesettingFeatures& features)
 {
     hb_font_t* font = hb_font_create(m_face);
-    hb_font_set_funcs(font, harfBuzzCoreTextGetFontFuncs(), m_platformData, 0);
+    hb_font_set_funcs(font, harfBuzzCoreTextGetFontFuncs(features), m_platformData, 0);
     const float size = m_platformData->m_size;
     hb_font_set_ppem(font, size, size);
     const int scale = (1 << 16) * static_cast<int>(size);