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 1e0f4c5bc767ac25be66a0428a2b0c3b5767de58..d5f5518d6e4dd0dffe83e05f32950d5e4a5b2964 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',
@@ -405,10 +404,14 @@
       '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',
       'fonts/shaping/HarfBuzzShaper.h',
+      'fonts/shaping/ShapeCache.h',
       'fonts/shaping/Shaper.cpp',
       'fonts/shaping/Shaper.h',
       'fonts/shaping/SimpleShaper.cpp',
@@ -952,6 +955,7 @@
       'fonts/GlyphBufferTest.cpp',
       'fonts/GlyphPageTreeNodeTest.cpp',
       'fonts/android/FontCacheAndroidTest.cpp',
+      'fonts/shaping/CachingWordShaperTest.cpp',
       'fonts/shaping/HarfBuzzShaperTest.cpp',
       'geometry/FloatBoxTest.cpp',
       'geometry/FloatBoxTestHelpers.cpp',