Reland "Change fallback font collection in HarfBuzzShaper"

Source/platform/fonts/Font.cpp

Index: Source/platform/fonts/Font.cpp
diff --git a/Source/platform/fonts/Font.cpp b/Source/platform/fonts/Font.cpp
index fcf0d6448827e7020f7a94cd709879e699c2c9b5..5ee5e3bc2178439359efe0f6f685a9d759e1423a 100644
--- a/Source/platform/fonts/Font.cpp
+++ b/Source/platform/fonts/Font.cpp
@@ -707,8 +707,7 @@ float Font::floatWidthForComplexText(const TextRun& run, HashSet<const SimpleFon
 int Font::offsetForPositionForComplexText(const TextRun& run, float xFloat,
     bool includePartialGlyphs) const
 {
-    HashSet<const SimpleFontData*> fallbackFonts;
-    HarfBuzzShaper shaper(this, run, &fallbackFonts);
+    HarfBuzzShaper shaper(this, run);
     RefPtr<ShapeResult> shapeResult = shaper.shapeResult();
     if (!shapeResult)
         return 0;