Optimize Complex Text Shaping and Caching

Source/platform/blink_platform.gypi

Index: Source/platform/blink_platform.gypi
diff --git a/Source/platform/blink_platform.gypi b/Source/platform/blink_platform.gypi
index 45bc69869b5294b66f6060ab536b63177c929dee..9f954ba4a32be6931462aaed04fcfc78b97467f9 100644
--- a/Source/platform/blink_platform.gypi
+++ b/Source/platform/blink_platform.gypi
@@ -392,7 +392,6 @@
       'fonts/TextBlob.h',
       'fonts/VDMXParser.cpp',
       'fonts/VDMXParser.h',
-      'fonts/WidthCache.h',
       'fonts/android/FontCacheAndroid.cpp',
       'fonts/linux/FontCacheLinux.cpp',
       'fonts/linux/FontPlatformDataLinux.cpp',
@@ -405,6 +404,9 @@
       'fonts/opentype/OpenTypeTypes.h',
       'fonts/opentype/OpenTypeVerticalData.cpp',
       'fonts/opentype/OpenTypeVerticalData.h',
+      'fonts/shaping/CachingWordShapeIterator.h',
+      'fonts/shaping/CachingWordShaper.cpp',
+      'fonts/shaping/CachingWordShaper.h',
       'fonts/shaping/HarfBuzzFace.cpp',
       'fonts/shaping/HarfBuzzFace.h',
       'fonts/shaping/HarfBuzzShaper.cpp',
@@ -413,6 +415,7 @@
       'fonts/shaping/Shaper.h',
       'fonts/shaping/SimpleShaper.cpp',
       'fonts/shaping/SimpleShaper.h',
+      'fonts/shaping/ShapeCache.h',
       'fonts/skia/FontCacheSkia.cpp',
       'fonts/win/FontCacheSkiaWin.cpp',
       'fonts/win/FontFallbackWin.cpp',
@@ -947,6 +950,7 @@
       'fonts/GlyphBufferTest.cpp',
       'fonts/GlyphPageTreeNodeTest.cpp',
       'fonts/android/FontCacheAndroidTest.cpp',
+      'fonts/shaping/CachingWordShaperTest.cpp',
       'fonts/shaping/HarfBuzzShaperTest.cpp',
       'geometry/FloatBoxTest.cpp',
       'geometry/FloatBoxTestHelpers.cpp',