Make arguments to window.{move,resize}{To,By} non-optional

Source/core/frame/Window.idl

Index: Source/core/frame/Window.idl
diff --git a/Source/core/frame/Window.idl b/Source/core/frame/Window.idl
index 156ac738ab1842be3d2dcd7b4708dce1fbf3c456..7930d5abcb5983f37dd71ab825c2085baff86b89 100644
--- a/Source/core/frame/Window.idl
+++ b/Source/core/frame/Window.idl
@@ -107,11 +107,10 @@
     [SameObject, Replaceable] readonly attribute Screen screen;
 
     // browsing context
-    // FIXME: The x and y arguments should not be optional. crbug.com/453421
-    void moveTo(optional long x, optional long y);
-    void moveBy(optional long x, optional long y);
-    void resizeTo(optional long x, optional long y);
-    void resizeBy(optional long x, optional long y);
+    void moveTo(long x, long y);
+    void moveBy(long x, long y);
+    void resizeTo(long x, long y);
+    void resizeBy(long x, long y);
 
     // viewport
     [Replaceable] readonly attribute long innerWidth;