Better arity checks for overloads

LayoutTests/fast/canvas/script-tests/canvas-overloads-drawImage.js

Index: LayoutTests/fast/canvas/script-tests/canvas-overloads-drawImage.js
diff --git a/LayoutTests/fast/canvas/script-tests/canvas-overloads-drawImage.js b/LayoutTests/fast/canvas/script-tests/canvas-overloads-drawImage.js
index 9db3cc508da32ddf98a97c0a3631732babb35e12..dfccb6119d40cf2967de8db3e1a32172253b7241 100644
--- a/LayoutTests/fast/canvas/script-tests/canvas-overloads-drawImage.js
+++ b/LayoutTests/fast/canvas/script-tests/canvas-overloads-drawImage.js
@@ -2,35 +2,29 @@ description("Test the behavior of CanvasRenderingContext2D.drawImage() when call
 
 var ctx = document.createElement('canvas').getContext('2d');
 
-function ExpectedNotEnoughArgumentsMessage(num) {
-    return "\"TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': 3 arguments required, but only " + num + " present.\"";
-}
-
-var TypeError = "TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': No function was found that matched the signature provided.";
-
 var imageElement = document.createElement("img");
-shouldThrow("ctx.drawImage()", ExpectedNotEnoughArgumentsMessage(0));
-shouldThrow("ctx.drawImage(imageElement)", ExpectedNotEnoughArgumentsMessage(1));
-shouldThrow("ctx.drawImage(imageElement, 0)", ExpectedNotEnoughArgumentsMessage(2));
+shouldThrow("ctx.drawImage()");
+shouldThrow("ctx.drawImage(imageElement)");
+shouldThrow("ctx.drawImage(imageElement, 0)");
 shouldBe("ctx.drawImage(imageElement, 0, 0)", "undefined");
-shouldThrow("ctx.drawImage(imageElement, 0, 0, 0)", "TypeError");
+shouldThrow("ctx.drawImage(imageElement, 0, 0, 0)");
 shouldBe("ctx.drawImage(imageElement, 0, 0, 0, 0)", "undefined");
-shouldThrow("ctx.drawImage(imageElement, 0, 0, 0, 0, 0)", "TypeError");
-shouldThrow("ctx.drawImage(imageElement, 0, 0, 0, 0, 0, 0)", "TypeError");
-shouldThrow("ctx.drawImage(imageElement, 0, 0, 0, 0, 0, 0, 0)", "TypeError");
+shouldThrow("ctx.drawImage(imageElement, 0, 0, 0, 0, 0)");
+shouldThrow("ctx.drawImage(imageElement, 0, 0, 0, 0, 0, 0)");
+shouldThrow("ctx.drawImage(imageElement, 0, 0, 0, 0, 0, 0, 0)");
 shouldBe("ctx.drawImage(imageElement, 0, 0, 0, 0, 0, 0, 0, 0)", "undefined");
-shouldThrow("ctx.drawImage(imageElement, 0, 0, 0, 0, 0, 0, 0, 0, 0)", "TypeError");
-shouldThrow("ctx.drawImage(imageElement, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)", "TypeError");
+shouldThrow("ctx.drawImage(imageElement, 0, 0, 0, 0, 0, 0, 0, 0, 0)");
+shouldThrow("ctx.drawImage(imageElement, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)");
 
 var canvasElement = document.createElement("canvas");
-shouldThrow("ctx.drawImage(canvasElement)", ExpectedNotEnoughArgumentsMessage(1));
-shouldThrow("ctx.drawImage(canvasElement, 0)", ExpectedNotEnoughArgumentsMessage(2));
+shouldThrow("ctx.drawImage(canvasElement)");
+shouldThrow("ctx.drawImage(canvasElement, 0)");
 shouldBe("ctx.drawImage(canvasElement, 0, 0)", "undefined");
-shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0)", "TypeError");
+shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0)");
 shouldBe("ctx.drawImage(canvasElement, 0, 0, 0, 0)", "undefined");
-shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0)", "TypeError");
-shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0, 0)", "TypeError");
-shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0, 0, 0)", "TypeError");
+shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0)");
+shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0, 0)");
+shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0, 0, 0)");
 shouldBe("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0, 0, 0, 0)", "undefined");
-shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0, 0, 0, 0, 0)", "TypeError");
-shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)", "TypeError");
+shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0, 0, 0, 0, 0)");
+shouldThrow("ctx.drawImage(canvasElement, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)");