Remove GlyphBufferAdvance abstraction.

Source/platform/fonts/harfbuzz/HarfBuzzShaper.cpp

Index: Source/platform/fonts/harfbuzz/HarfBuzzShaper.cpp
diff --git a/Source/platform/fonts/harfbuzz/HarfBuzzShaper.cpp b/Source/platform/fonts/harfbuzz/HarfBuzzShaper.cpp
index a4f6854e804950ee3e9ea1dd7c6ec3092114d01a..051f63c540257edb7265d73e23d5c5e0fb65cbe3 100644
--- a/Source/platform/fonts/harfbuzz/HarfBuzzShaper.cpp
+++ b/Source/platform/fonts/harfbuzz/HarfBuzzShaper.cpp
@@ -946,12 +946,12 @@ void HarfBuzzShaper::fillGlyphBufferFromHarfBuzzRun(GlyphBuffer* glyphBuffer, Ha
             if (currentCharacterIndex >= m_toIndex)
                 m_startOffset.move(glyphAdvanceX, glyphAdvanceY);
             else if (currentCharacterIndex >= m_fromIndex)
-                glyphBuffer->add(glyphs[i], currentRun->fontData(), createGlyphBufferAdvance(glyphAdvanceX, glyphAdvanceY));
+                glyphBuffer->add(glyphs[i], currentRun->fontData(), FloatSize(glyphAdvanceX, glyphAdvanceY));
         } else {
             if (currentCharacterIndex < m_fromIndex)
                 m_startOffset.move(glyphAdvanceX, glyphAdvanceY);
             else if (currentCharacterIndex < m_toIndex)
-                glyphBuffer->add(glyphs[i], currentRun->fontData(), createGlyphBufferAdvance(glyphAdvanceX, glyphAdvanceY));
+                glyphBuffer->add(glyphs[i], currentRun->fontData(), FloatSize(glyphAdvanceX, glyphAdvanceY));
         }
     }
 }
@@ -1002,7 +1002,7 @@ void HarfBuzzShaper::fillGlyphBufferForTextEmphasis(GlyphBuffer* glyphBuffer, Ha
             for (unsigned j = 0; j < graphemesInCluster; ++j) {
                 // Do not put emphasis marks on space, separator, and control characters.
                 Glyph glyphToAdd = Character::canReceiveTextEmphasis(m_run[currentCharacterIndex]) ? 1 : 0;
-                glyphBuffer->add(glyphToAdd, currentRun->fontData(), createGlyphBufferAdvance(glyphAdvanceX, 0));
+                glyphBuffer->add(glyphToAdd, currentRun->fontData(), glyphAdvanceX);
             }
             clusterStart = clusterEnd;
             clusterAdvance = 0;