Rename CanvasPathMethods to CanvasPath

third_party/WebKit/LayoutTests/fast/canvas/canvas-arc-negative-radius.html

 <script src="../../resources/testharness.js"></script>
 <script src="../../resources/testharnessreport.js"></script>
 <p id="description"></p>
 <div id="console"></div>
 
 <script>
 test(function(t) {
     var canvas = document.createElement("canvas");
     var ctx = canvas.getContext('2d');
 
     ctx.arc(10, 10, 5, 0, 1, false);
     ctx.arc(10, 10, 0, 0, 1, false);
     assert_throws(null, function() {ctx.arc(10, 10, -5, 0, 1, false);});
 
     ctx.arcTo(10, 10, 20, 20, 5);
     ctx.arcTo(10, 10, 20, 20, 0);
     assert_throws(null, function() {ctx.arcTo(10, 10, 20, 20, -5);});
 
     var path = new Path2D();
 
     path.arc(10, 10, 5, 0, 1, false);
     path.arc(10, 10, 0, 0, 1, false);
     assert_throws(null, function() {path.arc(10, 10, -5, 0, 1, false);});
 
     path.arcTo(10, 10, 20, 20, 5);
     path.arcTo(10, 10, 20, 20, 0);
     assert_throws(null, function() {path.arcTo(10, 10, 20, 20, -5);});
-}, 'Tests CanvasPathMethods arc and arcTo with negative radii.');
+}, 'Tests CanvasPath arc and arcTo with negative radii.');
 </script>