Add versions of stroke, fill, and clip that take a Path parameter.

LayoutTests/virtual/gpu/fast/canvas/canvas-path-context-stroke-expected.txt

Index: LayoutTests/virtual/gpu/fast/canvas/canvas-path-context-stroke-expected.txt
diff --git a/LayoutTests/fast/canvas/canvas-clip-rule-expected.txt b/LayoutTests/virtual/gpu/fast/canvas/canvas-path-context-stroke-expected.txt
similarity index 61%
copy from LayoutTests/fast/canvas/canvas-clip-rule-expected.txt
copy to LayoutTests/virtual/gpu/fast/canvas/canvas-path-context-stroke-expected.txt
index eb71dc951eeb1cbb2858af901df796074d0305f2..dad09a42cb706bf3f77b225cff0cbc0f215fbd86 100644
--- a/LayoutTests/fast/canvas/canvas-clip-rule-expected.txt
+++ b/LayoutTests/virtual/gpu/fast/canvas/canvas-path-context-stroke-expected.txt
@@ -1,26 +1,20 @@
-Series of tests to ensure correct results of the winding rule.
+Series of tests to ensure stroke() works with optional path parameter.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-Testing default clip
+Testing stroke()
+
 PASS pixelDataAtPoint()[0] is within 5 of 0
 PASS pixelDataAtPoint()[1] is within 5 of 255
 PASS pixelDataAtPoint()[2] is within 5 of 0
 PASS pixelDataAtPoint()[3] is within 5 of 255
+Testing stroke(path)
 
-Testing nonzero clip
 PASS pixelDataAtPoint()[0] is within 5 of 0
 PASS pixelDataAtPoint()[1] is within 5 of 255
 PASS pixelDataAtPoint()[2] is within 5 of 0
 PASS pixelDataAtPoint()[3] is within 5 of 255
-
-Testing evenodd clip
-PASS pixelDataAtPoint()[0] is within 5 of 255
-PASS pixelDataAtPoint()[1] is within 5 of 0
-PASS pixelDataAtPoint()[2] is within 5 of 0
-PASS pixelDataAtPoint()[3] is within 5 of 255
-
 PASS successfullyParsed is true
 
 TEST COMPLETE