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

Source/core/html/canvas/CanvasRenderingContext2D.idl

Index: Source/core/html/canvas/CanvasRenderingContext2D.idl
diff --git a/Source/core/html/canvas/CanvasRenderingContext2D.idl b/Source/core/html/canvas/CanvasRenderingContext2D.idl
index efa9d8c443807eb80775a623e5492b0daceac238..7c0764d7fc35537b7757eb698acd8c05cba7a157 100644
--- a/Source/core/html/canvas/CanvasRenderingContext2D.idl
+++ b/Source/core/html/canvas/CanvasRenderingContext2D.idl
@@ -80,8 +80,13 @@ interface CanvasRenderingContext2D : CanvasRenderingContext {
     [RaisesException] void arc(float x, float y, float radius, float startAngle, float endAngle, [Default=Undefined] optional boolean anticlockwise);
     [RaisesException] void ellipse(float x, float y, float radiusX, float radiusY, float rotation, float startAngle, float endAngle, [Default=Undefined] optional boolean anticlockwise);
 
+    // Not flagged as RuntimeEnabled=ExperimentalCanvasFeatures, see crbug.com/339000.
+    void fill(Path path, optional CanvasWindingRule winding);

[Inactive, 2014/02/19 16:06:24]

Until the generator is fixed, you could mark the method as [Custom] and handle
the overloading manually in the custom bindings, with a proper runtime enabled
flag check to handle 2 args.

     void fill(optional CanvasWindingRule winding);
     void stroke();
+    [RuntimeEnabled=ExperimentalCanvasFeatures] void stroke(Path path);
+    // Not flagged as RuntimeEnabled=ExperimentalCanvasFeatures, see crbug.com/339000.
+    void clip(Path path, optional CanvasWindingRule winding);
     void clip(optional CanvasWindingRule winding);
     boolean isPointInPath(float x, float y, optional CanvasWindingRule winding);
     boolean isPointInStroke(float x, float y);