Remove get/set currentPath in canvas

LayoutTests/fast/canvas/script-tests/canvas-path-addpath.js

 description("Test addPath() method.");
 var canvas = document.createElement('canvas');
 var ctx = canvas.getContext('2d');
 
 debug("Test addPath() with transform as identity matrix.")
 ctx.clearRect(0, 0, canvas.width, canvas.height);
 ctx.beginPath();
 var p1 = new Path2D();
 p1.rect(0,0,100,100);
 var p2 = new Path2D();
 p2.rect(0,100,100,100);
 var m = ctx.currentTransform;
 p1.addPath(p2, m);
 ctx.fillStyle = 'yellow';
-ctx.currentPath = p1;
-ctx.fill();
+ctx.fill(p1);
 var imageData = ctx.getImageData(0, 100, 100, 100);
 var imgdata = imageData.data;
 shouldBe("imgdata[4]", "255");
 shouldBe("imgdata[5]", "255");
 shouldBe("imgdata[6]", "0");
 shouldBe("imgdata[7]", "255");
 debug("");
 
 debug("Test addPath() with transform as translate(100, -100).")
 ctx.clearRect(0, 0, canvas.width, canvas.height);
 ctx.beginPath();
 var p3 = new Path2D();
 p3.rect(0,0,100,100);
 var p4 = new Path2D();
 p4.rect(0,100,100,100);
 m.a = 1; m.b = 0;
 m.c = 0; m.d = 1;
 m.e = 100; m.f = -100;
 p3.addPath(p4, m);
 ctx.fillStyle = 'yellow';
-ctx.currentPath = p3;
-ctx.fill();
+ctx.fill(p3);
 imageData = ctx.getImageData(100, 0, 100, 100);
 imgdata = imageData.data;
 shouldBe("imgdata[4]", "255");
 shouldBe("imgdata[5]", "255");
 shouldBe("imgdata[6]", "0");
 shouldBe("imgdata[7]", "255");
 debug("");
 
 debug("Test addPath() with non-invertible transform.")
 ctx.clearRect(0, 0, canvas.width, canvas.height);
 ctx.beginPath();
 var p5 = new Path2D();
 p5.rect(0,0,100,100);
 var p6 = new Path2D();
 p6.rect(100,100,100,100);
 m.a = 0; m.b = 0;
 m.c = 0; m.d = 0;
 m.e = 0; m.f = 0;
 p5.addPath(p6, m);
 ctx.fillStyle = 'yellow';
-ctx.currentPath = p5;
-ctx.fill();
+ctx.fill(p5);
 imageData = ctx.getImageData(100, 100, 100, 100);
 imgdata = imageData.data;
 shouldNotBe("imgdata[4]", "255");
 shouldNotBe("imgdata[5]", "255");
 shouldBe("imgdata[6]", "0");
 shouldNotBe("imgdata[7]", "255");
 debug("");
 
 debug("Test addPath() with transform as null or invalid type.")
 ctx.clearRect(0, 0, canvas.width, canvas.height);
 ctx.beginPath();
 var p7 = new Path2D();
 p7.rect(0,0,100,100);
 var p8 = new Path2D();
 p8.rect(100,100,100,100);
 p7.addPath(p8, null);
 shouldThrow("p7.addPath(p8, [])");
 shouldThrow("p7.addPath(p8, {})");
 ctx.fillStyle = 'red';
-ctx.currentPath = p7;
-ctx.fill();
+ctx.fill(p7);
 imageData = ctx.getImageData(100, 100, 100, 100);
 imgdata = imageData.data;
 shouldBe("imgdata[4]", "255");
 shouldBe("imgdata[5]", "0");
 shouldBe("imgdata[6]", "0");
 shouldBe("imgdata[7]", "255");
 debug("");
 
 debug("Test addPath() with transform omitted.")
 ctx.clearRect(0, 0, canvas.width, canvas.height);
 ctx.beginPath();
 var p9 = new Path2D();
 var p10 = new Path2D();
 p9.rect(0,0,10,10);
 p10.addPath(p9);
 ctx.fillStyle = 'red';
-ctx.currentPath = p10;
-ctx.fill();
+ctx.fill(p10);
 imageData = ctx.getImageData(1, 1, 1, 1);
 imgdata = imageData.data;
 shouldBe("imgdata[0]", "255");
 shouldBe("imgdata[1]", "0");
 shouldBe("imgdata[2]", "0");
 shouldBe("imgdata[3]", "255");
 debug("");
 
 debug("Test addPath() with path as null and invalid type");
 var p9 = new Path2D();
 p9.rect(0,0,100,100);
 shouldThrow("p7.addPath(null, m)");
 shouldThrow("p7.addPath([], m)");
 shouldThrow("p7.addPath({}, m)");
 debug("");