Simplify CRC2D winding rule handling

LayoutTests/fast/canvas/script-tests/canvas-path-context-clip.js

Index: LayoutTests/fast/canvas/script-tests/canvas-path-context-clip.js
diff --git a/LayoutTests/fast/canvas/script-tests/canvas-path-context-clip.js b/LayoutTests/fast/canvas/script-tests/canvas-path-context-clip.js
index 94aa3201dda2b17682edc902958ab74e7d36e1ee..2da69d93fa15ef92088fef9082a4b4af5f0c9533 100644
--- a/LayoutTests/fast/canvas/script-tests/canvas-path-context-clip.js
+++ b/LayoutTests/fast/canvas/script-tests/canvas-path-context-clip.js
@@ -55,7 +55,7 @@ function testClipWith(fillRule, path) {
 // Execute test.
 function prepareTestScenario() {
     fillRules = [undefined, 'nonzero', 'evenodd'];
-    var path = new Path2D();
+    path = new Path2D();
     drawRectanglesOn(path);
 
     for (var i = 0; i < fillRules.length; i++) {
@@ -72,6 +72,8 @@ function prepareTestScenario() {
     shouldThrow("ctx.clip(null, 'evenodd')");
     shouldThrow("ctx.clip([], 'evenodd')");
     shouldThrow("ctx.clip({}, 'evenodd')");
+    shouldThrow("ctx.clip('gazonk')");
+    shouldThrow("ctx.clip(path, 'gazonk')");
 }
 
 // Run test and allow variation of results.