Add more WebRuntimeFeatures plumbing for fast text autosizing

Source/web/WebRuntimeFeatures.cpp

Index: Source/web/WebRuntimeFeatures.cpp
diff --git a/Source/web/WebRuntimeFeatures.cpp b/Source/web/WebRuntimeFeatures.cpp
index c10d27a63d1e0fd255147179e71378608d98deeb..52fc155ac2de74fd5719df2a01ef9cf5fd42a301 100644
--- a/Source/web/WebRuntimeFeatures.cpp
+++ b/Source/web/WebRuntimeFeatures.cpp
@@ -144,6 +144,16 @@ bool WebRuntimeFeatures::isExperimentalCanvasFeaturesEnabled()
     return RuntimeEnabledFeatures::experimentalCanvasFeaturesEnabled();
 }
 
+void WebRuntimeFeatures::enableFastTextAutosizing(bool enable)
+{
+    RuntimeEnabledFeatures::setFastTextAutosizingEnabled(enable);
+}
+
+bool WebRuntimeFeatures::isFastTextAutosizingEnabled()
+{
+    return RuntimeEnabledFeatures::fastTextAutosizingEnabled();
+}
+
 void WebRuntimeFeatures::enableFileSystem(bool enable)
 {
     RuntimeEnabledFeatures::setFileSystemEnabled(enable);