Adding blink side flag that allows disabling YUV decoding

Source/web/WebRuntimeFeatures.cpp

Index: Source/web/WebRuntimeFeatures.cpp
diff --git a/Source/web/WebRuntimeFeatures.cpp b/Source/web/WebRuntimeFeatures.cpp
index a10025ec60617b5d5e410ead33467e63c1514278..609cfe71720341cd441746c90d64a55e39ce0dd3 100644
--- a/Source/web/WebRuntimeFeatures.cpp
+++ b/Source/web/WebRuntimeFeatures.cpp
@@ -75,6 +75,11 @@ void WebRuntimeFeatures::enableDatabase(bool enable)
     RuntimeEnabledFeatures::setDatabaseEnabled(enable);
 }
 
+void WebRuntimeFeatures::enableDecodeToYUV(bool enable)
+{
+    RuntimeEnabledFeatures::setDecodeToYUVEnabled(enable);
+}
+
 void WebRuntimeFeatures::enableDisplayList2dCanvas(bool enable)
 {
     RuntimeEnabledFeatures::setDisplayList2dCanvasEnabled(enable);