Make Document.createTouch arguments non-optional

third_party/WebKit/Source/core/dom/Document.idl

Index: third_party/WebKit/Source/core/dom/Document.idl
diff --git a/third_party/WebKit/Source/core/dom/Document.idl b/third_party/WebKit/Source/core/dom/Document.idl
index 8b3ae3e71b25e99932fb891d427cfb90e5922f57..68a3907d9215aa857f098c0365f1fb9457f5e0e2 100644
--- a/third_party/WebKit/Source/core/dom/Document.idl
+++ b/third_party/WebKit/Source/core/dom/Document.idl
@@ -156,19 +156,18 @@ interface Document : Node {
 
     // Touch Events
     // https://w3c.github.io/touch-events/#extensions-to-the-document-interface
-    // FIXME: The arguments should not be optional.
     [RuntimeEnabled=TouchEventFeatureDetection, Measure, LegacyInterfaceTypeChecking, Custom=CallPrologue]
-    Touch createTouch([Default=Undefined] optional Window window,
-                      [Default=Undefined] optional EventTarget target,
-                      [Default=Undefined] optional long identifier,
-                      [Default=Undefined] optional unrestricted double pageX,
-                      [Default=Undefined] optional unrestricted double pageY,
-                      [Default=Undefined] optional unrestricted double screenX,
-                      [Default=Undefined] optional unrestricted double screenY,
-                      [Default=Undefined] optional unrestricted double radiusX,
-                      [Default=Undefined] optional unrestricted double radiusY,
-                      [Default=Undefined] optional unrestricted float rotationAngle,
-                      [Default=Undefined] optional unrestricted float force);
+    Touch createTouch(Window view,
+                      EventTarget target,
+                      long identifier,
+                      double pageX,
+                      double pageY,
+                      double screenX,
+                      double screenY,
+                      optional unrestricted double radiusX = 0,
+                      optional unrestricted double radiusY = 0,
+                      optional unrestricted float rotationAngle = 0,
+                      optional unrestricted float force = 0);
     [RuntimeEnabled=TouchEventFeatureDetection] TouchList createTouchList(Touch... touches);
 
     // Custom Elements