window.scroll() without params should be ignored or throw an error

LayoutTests/fast/dom/Window/window-scroll-arguments.html

Index: LayoutTests/fast/dom/Window/window-scroll-arguments.html
diff --git a/LayoutTests/fast/dom/Window/window-scroll-arguments.html b/LayoutTests/fast/dom/Window/window-scroll-arguments.html
index 22d0ef6c6e1c213315126b5a5bae9b79d68ffa74..ccf125a1199932de68a506c00992f41d89ca24d0 100644
--- a/LayoutTests/fast/dom/Window/window-scroll-arguments.html
+++ b/LayoutTests/fast/dom/Window/window-scroll-arguments.html
@@ -25,7 +25,7 @@
     reset();
 
     description("This test makes sure that calling the window scrolling\
-    methods with less than 2 arguments treats the missing arguments as 0.");
+    methods with less than 2 arguments throws exception.");
 
     // scrollTo /////////////////////////
     debug('');
@@ -33,15 +33,11 @@
     debug('');
 
     debug("Testing - scrollTo with 0 arguments");
-    window.scrollTo();
-    shouldBe('window.scrollX', 'resetX');
-    shouldBe('window.scrollY', 'resetY');
+    shouldThrow('window.scrollTo()');
     reset();
 
     debug("Testing - scrollTo with 1 argument");
-    window.scrollTo(x);
-    shouldBe('window.scrollX', 'resetX + x');
-    shouldBe('window.scrollY', 'resetY');
+    shouldThrow('window.scrollTo(x)');;
     reset();
 
     debug("Testing - scrollTo with more than 2 arguments");
@@ -56,15 +52,11 @@
     debug('');
 
     debug("Testing - scroll with 0 arguments");
-    window.scroll();
-    shouldBe('window.scrollX', 'resetX');
-    shouldBe('window.scrollY', 'resetY');
+    shouldThrow('window.scroll()');;
     reset();
 
     debug("Testing - scroll with 1 argument");
-    window.scroll(x);
-    shouldBe('window.scrollX', 'resetX + x');
-    shouldBe('window.scrollY', 'resetY');
+    shouldThrow('window.scroll(x)');
     reset();
 
     debug("Testing - scroll with more than 2 arguments");
@@ -79,15 +71,11 @@
     debug('');
 
     debug("Testing - scrollBy with 0 arguments");
-    window.scrollBy();
-    shouldBe('window.scrollX', 'resetX');
-    shouldBe('window.scrollY', 'resetY');
+    shouldThrow('window.scrollBy()');;
     reset();
 
     debug("Testing - scrollBy with 1 argument");
-    window.scrollBy(x);
-    shouldBe('window.scrollX', 'resetX + x');
-    shouldBe('window.scrollY', 'resetY');
+    shouldThrow('window.scrollBy(x)');
     reset();
 
     debug("Testing - scrollBy with more than 2 arguments");