Reland "Change fallback font collection in HarfBuzzShaper"

Source/platform/fonts/shaping/CachingWordShaperTest.cpp

Index: Source/platform/fonts/shaping/CachingWordShaperTest.cpp
diff --git a/Source/platform/fonts/shaping/CachingWordShaperTest.cpp b/Source/platform/fonts/shaping/CachingWordShaperTest.cpp
index 6285d799cfe8d21c99d1248010b5d5d32e5e9608..3f2ca52ab0826537b92e829355d437db4878c8e2 100644
--- a/Source/platform/fonts/shaping/CachingWordShaperTest.cpp
+++ b/Source/platform/fonts/shaping/CachingWordShaperTest.cpp
@@ -47,7 +47,7 @@ TEST_F(CachingWordShaperTest, LatinLeftToRightByWord)
     TextRun textRun(reinterpret_cast<const LChar*>("ABC DEF."), 8);
 
     RefPtr<ShapeResult> result;
-    CachingWordShapeIterator iterator(cache, textRun, font, fallbackFonts);
+    CachingWordShapeIterator iterator(cache, textRun, font);
     ASSERT_TRUE(iterator.next(&result));
     ASSERT_TRUE(result->runInfoForTesting(0, startIndex, numGlyphs, script));
     EXPECT_EQ(0u, startIndex);
@@ -76,7 +76,7 @@ TEST_F(CachingWordShaperTest, CommonAccentLeftToRightByWord)
 
     unsigned offset = 0;
     RefPtr<ShapeResult> result;
-    CachingWordShapeIterator iterator(cache, textRun, font, fallbackFonts);
+    CachingWordShapeIterator iterator(cache, textRun, font);
     ASSERT_TRUE(iterator.next(&result));
     ASSERT_TRUE(result->runInfoForTesting(0, startIndex, numGlyphs, script));
     EXPECT_EQ(0u, offset + startIndex);