Remove the webkit prefix from idl properties and interfaces.

sky/engine/web/WebInputEventConversion.cpp

Index: sky/engine/web/WebInputEventConversion.cpp
diff --git a/sky/engine/web/WebInputEventConversion.cpp b/sky/engine/web/WebInputEventConversion.cpp
index 204429c7f6e95f54467d3efcde20d7732bcd39f3..069f4862ec902731aafd69f57a49775fada32a7a 100644
--- a/sky/engine/web/WebInputEventConversion.cpp
+++ b/sky/engine/web/WebInputEventConversion.cpp
@@ -753,7 +753,7 @@ static void addTouchPoints(const Widget* widget, const AtomicString& touchType,
         point.position = convertAbsoluteLocationForRenderObjectFloat(touch->absoluteLocation(), *renderObject);
         point.radiusX = touch->radiusX();
         point.radiusY = touch->radiusY();
-        point.rotationAngle = touch->webkitRotationAngle();
+        point.rotationAngle = touch->rotationAngle();
         point.force = touch->force();
         point.state = toWebTouchPointState(touchType);